Biology Exam 2 Engaging Quiz

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  • 1/83 Questions

    Which of the following would be a good way to riben a green tomato?

    • Putting it in a darenend area such as a drawer or box
    • Placing it in a sealed plastic bag with an overripe banana
    • Wrapping in foil and putting it in the refridgerator
    • Placing it in a microwave, on low power, for 5 mintues
    • Placing it under a bright light for 24 hours
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About This Quiz


Welcome one, welcome all to the second rendition of our engaging biology exam series! In this quiz we’ll test your knowledge on a wide range of topics within the broad scientific topic of biology, including plants, gases, cells, reproductions and much more. How many questions can you get right?

Biology Exam 2 Engaging Quiz - Quiz

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  • 2. 

    On a trip to the southwest, you and a friend collect some seeds from a pinon, which is a type of pine tree.  Your friend also gathers a small bagful of soild for under the pinon tree.  Back home both of you plants your seeds in commerical sterilized poittting soil, but your firend addsa spoonful of collectedd dirt to each of her pots.  her seedling do better than yours.  which of the floowing is the likeliest reason?

    • The soild from the southest probably contined fungi able to establish a mycorrhizal association with the seedlings roots.

    • The soil from the southwest probably contained nitrogen fixing bactera that colonized seelings root nodles

    Correct Answer
    A. The soild from the southest probably contined fungi able to establish a mycorrhizal association with the seedlings roots.
    Explanation
    The likely reason why your friend's seedlings did better than yours is because the soil from the southwest probably contained fungi that were able to establish a mycorrhizal association with the seedlings' roots. This association between the fungi and the roots helps enhance nutrient uptake and overall plant growth, giving your friend's seedlings an advantage over yours.

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  • 3. 

    What is the main effect of auxins on plant growth

    • They reduce growth by preventing cell elongation

    • They increase grwtoh by promoting cell division and elongation

    • Auxins have no effect on plant growth

    • They increase grwoth by increasing the rate of photysynthesis

    • They reduce growth by inhibiting cell division

    Correct Answer
    A. They increase grwtoh by promoting cell division and elongation
    Explanation
    Auxins are a class of plant hormones that play a crucial role in regulating plant growth and development. One of the main effects of auxins is to promote cell division and elongation, leading to increased growth. By stimulating cell division, auxins contribute to the formation of new tissues and organs in plants. Additionally, auxins also promote cell elongation, which is responsible for the elongation and expansion of plant cells, resulting in overall growth. Therefore, the correct answer states that auxins increase growth by promoting cell division and elongation.

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  • 4. 

    If the auxin that is produced by an apical meristem is transported in euqal amounts down all sides of a twig, the twig will probably

    • Elongate evenly

    • Branch near its tip

    • Flower

    • Bend away from the apical meristem

    • Develop furit

    Correct Answer
    A. Elongate evenly
    Explanation
    When auxin is transported in equal amounts down all sides of a twig, it promotes cell elongation uniformly. This means that all sides of the twig will grow at the same rate, resulting in even elongation. Therefore, the twig will elongate evenly.

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  • 5. 

    Which of the following is not a function of the root system?

    • Photosynthesis

    • Anchor plant into the soil

    • Uptake of nutrients

    • Absorb water

    Correct Answer
    A. Photosynthesis
    Explanation
    The root system of a plant is responsible for anchoring the plant into the soil, absorbing water, and uptake of nutrients. However, photosynthesis is not a function of the root system. Photosynthesis occurs in the leaves of the plant, where chlorophyll captures sunlight and converts it into energy through a chemical process. The roots do not have chlorophyll and therefore cannot perform photosynthesis.

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  • 6. 

    Plants grow toward light through the action of

    • Solar energy

    • Nerves

    • Hormones

    • Enyzmes

    • Chloroplasts

    Correct Answer
    A. Hormones
    Explanation
    Plants grow toward light through the action of hormones. Hormones in plants, such as auxins, help regulate growth and development. When a plant is exposed to light, auxins move towards the shaded side of the plant, causing the cells on that side to elongate. This differential growth causes the plant to bend towards the light source. Therefore, hormones play a crucial role in enabling plants to grow towards light.

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  • 7. 

    The male organ of a flower is the

    • Stigma

    • Carpel

    • Sepal

    • Stamen

    • Style

    Correct Answer
    A. Stamen
    Explanation
    The male organ of a flower is called the stamen. It consists of two main parts, the anther and the filament. The anther produces and holds the pollen, which contains the male gametes. The filament supports the anther and positions it for pollination. The stamen is responsible for the reproductive function of the flower by producing and releasing pollen to fertilize the female reproductive organs of other flowers.

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  • 8. 

    Gardeners pinch off the stem tip to make a plant bushier.  This works against which of the following

    • Apical dominance

    • Lateral dominance

    • Double fertization

    • Pollination

    Correct Answer
    A. Apical dominance
    Explanation
    When gardeners pinch off the stem tip of a plant, it disrupts the apical dominance, which is the control exerted by the terminal bud on the growth of lateral buds. The terminal bud produces hormones that inhibit the growth of lateral buds, causing the plant to grow taller rather than bushier. By removing the terminal bud, gardeners promote the growth of lateral buds and encourage the plant to become bushier. Therefore, pinching off the stem tip works against apical dominance.

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  • 9. 

    When a nursery worker pinches off the terminal buds on a young chrysanthemum plant to make it grow bushy, which of the following plant hormones is mainly repsonsible for growth of side branches?

    • A cytokinin

    • An auxin

    • Abscisic acid

    • A gibberllin

    • Ethylene

    Correct Answer
    A. A cytokinin
    Explanation
    When a nursery worker pinches off the terminal buds on a young chrysanthemum plant, it stimulates the growth of side branches. This is mainly due to the plant hormone called cytokinin. Cytokinins promote cell division and growth in plants, particularly in the lateral buds. By removing the terminal buds, the concentration of cytokinins increases in the lateral buds, leading to their activation and subsequent growth of side branches.

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  • 10. 

    In a showy flower such as a magnolia or rose, the flower parts that ply the main role in attracting the notice of animal pollinators are the

    • Furits

    • Petals

    • Stamens

    • Sepals

    • Stigmas

    Correct Answer
    A. Petals
    Explanation
    The petals of a flower play the main role in attracting the notice of animal pollinators. They are often brightly colored and have attractive patterns or markings that help to attract pollinators such as bees, butterflies, or birds. The petals also often have a pleasant scent that can further attract pollinators. By being visually appealing and enticing, the petals help to ensure that the flower is noticed and visited by pollinators, increasing the chances of successful pollination and reproduction for the plant.

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  • 11. 

    Which of the following is a funciton of fruits

    • Attracting pollinators

    • Seed dispersal

    • Protection of ovules

    • Pollen dispersal

    • Prodcution of food for the devleoping embryo

    Correct Answer
    A. Seed dispersal
    Explanation
    Fruits have evolved to perform the function of seed dispersal. This means that they aid in the dispersal of seeds away from the parent plant, increasing the chances of the seeds germinating and growing into new plants. Fruits often have adaptations that help them attract animals, such as bright colors, enticing smells, or tasty flesh. Animals that eat the fruits then carry the seeds in their digestive systems or on their fur, effectively transporting them to new locations where they can be deposited and potentially grow into new plants.

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  • 12. 

    What is the node of a plant stem?

    • The area between the shoots and the roots

    • Small pore where gases are exhanged

    • The point of leaf attachment

    • The point of apical dominance

    • The main photosynthetic organ of the stem

    Correct Answer
    A. The point of leaf attachment
    Explanation
    The node of a plant stem refers to the point of leaf attachment. This is where leaves, branches, or other structures grow from the stem. Nodes play a crucial role in determining the overall structure and growth pattern of the plant. They serve as the sites for leaf development and are important in the transportation of water, nutrients, and sugars throughout the plant.

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  • 13. 

    Which of the following growth responses causes teh shoots of plant grown in the dark to grwo upward.

    • Thigmotropism

    • Gravitropism

    • Heterotropism

    • Photoperiodism

    • Photoropism

    Correct Answer
    A. Gravitropism
    Explanation
    Gravitropism is the correct answer because it is the growth response that causes plant shoots to grow upward in the absence of light. Gravitropism is the plant's ability to sense and respond to gravity, causing the shoots to grow against gravity and towards the light source. This allows the plant to maximize its exposure to light for photosynthesis. Thigmotropism is the growth response to touch, heterotropism is not a recognized growth response, photoperiodism is the response to changes in day length, and phototropism is the growth response towards or away from a light source.

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  • 14. 

    A platn with a critical minimum day lenght of 14 hours that flowers in teh summer is a

    • Long-day plant

    • Short day plant

    • Neutral night plant

    • Short day plant

    • Neutral day plant

    Correct Answer
    A. Long-day plant
    Explanation
    A long-day plant is a plant that requires a critical minimum day length of more than 12 hours in order to flower. In this case, the plant described needs a day length of at least 14 hours to flower, indicating that it is a long-day plant.

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  • 15. 

    The cheif fucntion of roots haris is to

    • Decrease the anchoring pwoer of roots

    • Provide a home for symbiotic bacteria

    • Provide a direct passage way form the soil to the vascular cylinder

    • Increase the surface area for absorption of water and minerals

    • Protect roots from freezing temerpatrues

    Correct Answer
    A. Increase the surface area for absorption of water and minerals
    Explanation
    The chief function of root hairs is to increase the surface area for absorption of water and minerals. Root hairs are tiny, hair-like extensions that grow from the epidermal cells of the roots. They greatly increase the surface area of the root, allowing for more efficient absorption of water and minerals from the soil. This increased surface area allows the roots to take in a larger volume of nutrients, which is essential for the plant's growth and survival.

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  • 16. 

    The most reliabel way to stmulate branching in a plant is to

    • Apply aucin to the axillary buds

    • Add extra fertilizer

    • Remove the terminal buds

    • Give short-day light treatments

    • Apply ethylene

    Correct Answer
    A. Remove the terminal buds
    Explanation
    Removing the terminal buds of a plant is the most reliable way to stimulate branching. Terminal buds produce hormones that inhibit the growth of lateral buds, so by removing them, the inhibition is removed and the lateral buds can grow and branch out. Applying auxin to the axillary buds or giving short-day light treatments can also stimulate branching, but removing the terminal buds is considered the most effective method. Adding extra fertilizer or applying ethylene does not have a direct effect on branching.

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  • 17. 

    In many grocery stores, fresh fruits are sold prebagged in plastic bags dotted with holes so that they will not overripen.  The main function of the holes is to

    • Permit the fruit to drain after being washed.

    • Pervet the buildup of CO2

    • Prevent anaerobic conditions withing the bag

    • Facilitate diffusion of ethylene away from the fruit

    • Facilitate diffusion of O2 to the fruit

    Correct Answer
    A. Facilitate diffusion of ethylene away from the fruit
    Explanation
    The holes in the plastic bags allow for the diffusion of ethylene away from the fruit. Ethylene is a gas that is naturally produced by fruits as they ripen. If ethylene builds up around the fruit, it can accelerate the ripening process and cause the fruit to overripen quickly. By allowing ethylene to diffuse out of the bag, the holes help to slow down the ripening process and keep the fruit fresh for longer.

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  • 18. 

    The relationship beween a plant and mycohizal fungi is best described as

    • Parasitic

    • Competitive

    • Neutral

    • Commensal

    • Mutualistic

    Correct Answer
    A. Mutualistic
    Explanation
    The relationship between a plant and mycorrhizal fungi is mutualistic. Mycorrhizal fungi form a symbiotic association with plant roots, where they provide the plant with essential nutrients, such as phosphorus and nitrogen, in exchange for carbohydrates produced by the plant through photosynthesis. This mutually beneficial relationship enhances the plant's nutrient uptake and overall growth, while the fungi receive a source of energy. Therefore, both the plant and the mycorrhizal fungi benefit from this interaction, making it a mutualistic relationship.

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  • 19. 

    The increase in grith associated with production of wood and bark in trees occurs as a consequence of

    • Indeterminate growth

    • Sexual reproduction

    • Secondary growth

    • Primary growth

    • Growth in apical meristems

    Correct Answer
    A. Secondary growth
    Explanation
    Secondary growth is the correct answer because it is the process responsible for the increase in girth in trees. Secondary growth occurs in the lateral meristems, specifically the vascular cambium and cork cambium, which are responsible for producing secondary xylem (wood) and secondary phloem (bark). This process allows the tree to increase in diameter over time, resulting in the growth of wood and bark. Primary growth, on the other hand, is responsible for the increase in length of the plant, while the other options are not directly related to the increase in girth.

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  • 20. 

    Why might mutualistic relationships between plants and other oganism be expected to evolve

    • Because they benefit both organisms and increase their fitness

    • Because they tend to decrease mutution rate

    • Because they decrease competition in plant populations

    • Because the pltants and organisms have existed for millions of years

    • Because the plants and organisms occupy the same environment

    Correct Answer
    A. Because they benefit both organisms and increase their fitness
    Explanation
    Mutualistic relationships between plants and other organisms are expected to evolve because they benefit both organisms and increase their fitness. This type of relationship allows both parties to obtain resources or services that they wouldn't be able to acquire on their own, leading to improved survival and reproductive success. This mutual dependence promotes the evolution and maintenance of these relationships over time.

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  • 21. 

    Legumes are frequently grown in rotation with primary field crops.  What is the benefit oin this?

    • A greater amount of the primary crop can be harvested each year

    • Nitrogen is added to the soild by nitrogen fixing bacteria

    • Soil erosing is reduced by frequent plowing

    • Leguems decrease the amount of organic material in the soil

    • Aeration of the soil is decreased

    Correct Answer
    A. Nitrogen is added to the soild by nitrogen fixing bacteria
    Explanation
    Growing legumes in rotation with primary field crops benefits the soil by adding nitrogen through the process of nitrogen fixation. Legumes have a symbiotic relationship with nitrogen-fixing bacteria, which convert nitrogen from the atmosphere into a form that plants can use. This helps to enrich the soil with nitrogen, which is an essential nutrient for plant growth. By rotating legumes with primary crops, farmers can reduce the need for synthetic nitrogen fertilizers and improve soil fertility.

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  • 22. 

    A plants first line of defense against infection is

    • Salicylic acid

    • Avr genes

    • Systemic acquired resistance

    • R genes

    • Its epidermis

    Correct Answer
    A. Its epidermis
    Explanation
    The epidermis of a plant serves as its first line of defense against infection. The epidermis is the outermost layer of cells that covers the plant's surfaces, acting as a physical barrier to prevent pathogens from entering. It also contains specialized cells called guard cells that regulate the opening and closing of stomata, which further helps in preventing the entry of pathogens. Additionally, the epidermis may produce antimicrobial compounds and secrete substances that attract beneficial microorganisms to fight against potential pathogens. Overall, the epidermis plays a crucial role in protecting the plant from infections.

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  • 23. 

    New growth that increases stem length on a plant arsies mainly from

    • Apical meristems

    • The base of the stem

    • The tip of leaves

    • Cotyledons

    • The vascular cambium

    Correct Answer
    A. Apical meristems
    Explanation
    Apical meristems are responsible for the growth in length of plant stems. These meristems are located at the tips of the stems and roots and are responsible for producing new cells that differentiate into various tissues and organs. As the apical meristems divide and produce new cells, the stem length increases. This growth allows the plant to reach for sunlight and maximize its exposure to light for photosynthesis. Therefore, the correct answer is apical meristems.

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  • 24. 

    What is the difference between the heartwood and sapwood of a tree?

    • Heartwood contains old phloem that no longer functions and sapwood contains functioning phloem

    • Heartwood no longer transports water and minerals, while sapwood still conducts xylem sap

    • Heartwood conatins xylem and sapwood contains phloem

    • Sapwood contains xylem and heartwood contains phloem

    • Sapwood no longer tansports water and minerals, while heartwood still conducts xylem sap.

    Correct Answer
    A. Heartwood no longer transports water and minerals, while sapwood still conducts xylem sap
    Explanation
    Heartwood is the inner, older part of a tree trunk that no longer transports water and minerals. It is composed of non-living cells and provides structural support to the tree. On the other hand, sapwood is the outer, younger part of the tree trunk that still conducts xylem sap, which is responsible for transporting water and minerals from the roots to the rest of the tree. Therefore, the correct answer is that heartwood no longer transports water and minerals, while sapwood still conducts xylem sap.

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  • 25. 

    Which of the following is one adptive advantage for didous plants that lose thier leaves during the winter?

    • It prevents water loss from leaves when soil water is unavilable due to freezing

    • It improves reproductive success in insect-pollinated plants

    • If leaves are damaged by frost, the tree will die

    • A layer of leaves on the ground helpts keep plants roots warm

    • Production of new leaves each spring is more effieicent than supporting old leaves all winter

    Correct Answer
    A. It prevents water loss from leaves when soil water is unavilable due to freezing
    Explanation
    One adaptive advantage for deciduous plants that lose their leaves during the winter is that it prevents water loss from leaves when soil water is unavailable due to freezing. By shedding their leaves, these plants reduce the surface area through which water can evaporate, conserving water during the winter months when the soil is frozen and water is scarce. This adaptation helps the plants survive in cold and dry conditions by minimizing water loss and ensuring their survival until the soil thaws and water becomes available again.

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  • 26. 

    The plant growth response to tough is known as

    • Phototropism

    • Bolting

    • Geotropism

    • Gravitropism

    • Thigmotropism

    Correct Answer
    A. Thigmotropism
    Explanation
    Thigmotropism is the plant growth response to touch or mechanical stimulation. This response allows plants to respond to physical contact by growing or bending in a particular direction. Unlike phototropism (growth response to light), bolting (rapid growth and elongation of the stem), geotropism (growth response to gravity), and gravitropism (growth response to gravity), thigmotropism specifically refers to the plant's response to touch.

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  • 27. 

    Monocot floral parts usually occur in multiples of

    • Two

    • Seven

    • Three

    • Four

    • Five

    Correct Answer
    A. Three
    Explanation
    Monocot floral parts usually occur in multiples of three. This is because monocots typically have flower parts, such as petals, sepals, and stamens, arranged in threes or multiples of three. This characteristic is one of the distinguishing features of monocots, which are a type of flowering plant. By contrast, dicots, another type of flowering plant, typically have floral parts arranged in multiples of four or five.

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  • 28. 

    What fionic bondingoOsmosisrce is responsible for the cohesiveness of water?

    • Osmosis

    • Ionic bonding

    • Hydrogen bonding between water molecules

    • Diffusion of ions

    • Negative pressure created by evaporation

    Correct Answer
    A. Hydrogen bonding between water molecules
    Explanation
    Hydrogen bonding between water molecules is responsible for the cohesiveness of water. In a water molecule, the oxygen atom is slightly negative and the hydrogen atoms are slightly positive, creating a polar molecule. These polar molecules attract each other through hydrogen bonding, forming a network of intermolecular forces that give water its unique properties, such as high surface tension and the ability to stick to other substances. This cohesive force allows water molecules to stick together, creating a strong bond between them.

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  • 29. 

    Where do plants get most of their mass?

    • From chemical elements in the soil

    • From water, as van Helmont predicted

    • From nitrogen in the atmosphere

    • From organic molecules taken up from the soil

    • From carbon dioxide in the atmosphere

    Correct Answer
    A. From carbon dioxide in the atmosphere
    Explanation
    Plants get most of their mass from carbon dioxide in the atmosphere through the process of photosynthesis. During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose, which is then converted into other organic molecules, such as cellulose, that make up the plant's structure. While plants do require other nutrients like water and minerals from the soil, the majority of their mass is derived from carbon dioxide in the atmosphere.

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  • 30. 

    Micronutrients fucntion in plants mainly as

    • Food reserves for pollen grains

    • Regulators of membrane transport

    • Joining elements in organic molecules carbon skeletons

    • Cofactors in chemical reactions

    • Components of microtubules

    Correct Answer
    A. Cofactors in chemical reactions
    Explanation
    Micronutrients function in plants as cofactors in chemical reactions. Cofactors are non-protein molecules that bind to enzymes and assist in their biological activity. In plants, micronutrients such as iron, zinc, copper, manganese, molybdenum, and boron act as cofactors, playing essential roles in various enzymatic reactions. These reactions are crucial for processes like photosynthesis, respiration, nitrogen fixation, and hormone synthesis. Without these micronutrient cofactors, the enzymes would not be able to function properly, leading to impaired plant growth and development.

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  • 31. 

    Where does gas exchange occur in vascular plant leaves?

    • Stomata

    • Guard cells

    • Chloroplants

    • Cuticle

    Correct Answer
    A. Stomata
    Explanation
    Gas exchange occurs in the stomata of vascular plant leaves. Stomata are small openings located on the surface of the leaves. They are surrounded by two specialized cells called guard cells. These guard cells can open and close the stomata, regulating the exchange of gases such as oxygen and carbon dioxide with the surrounding environment. Chloroplasts, on the other hand, are responsible for photosynthesis, not gas exchange. The cuticle is a waxy layer on the surface of leaves that helps reduce water loss, but it does not directly participate in gas exchange.

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  • 32. 

    Most trees and shrubs continue to grow year after year. Such plants are known as

    • Perennials

    • Transannuals

    • Annuals

    • Biennials

    • Superannuals

    Correct Answer
    A. Perennials
    Explanation
    Perennials are plants that continue to grow year after year. Unlike annuals or biennials, which complete their life cycle in one or two years respectively, perennials live for multiple years. They have the ability to survive harsh winters and regrow from their roots or base each spring. This allows them to continue growing and flowering for several years, making them a popular choice for landscaping and gardening.

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  • 33. 

    In a flowering plant , sperm are produced by meiosis in the

    • Anthers

    • Stigma

    • Sepals

    • Petals

    • Ovaries

    Correct Answer
    A. Anthers
    Explanation
    In a flowering plant, sperm are produced by meiosis in the anthers. The anthers are the male reproductive organs of a flower and they contain pollen sacs where meiosis occurs to produce haploid pollen grains. These pollen grains contain the sperm cells that are necessary for fertilization to occur. Therefore, the anthers are responsible for producing the sperm in a flowering plant.

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  • 34. 

    Removing the terminal bud of a plant that shows apical dominance will cause

    • Increased growth of axillary buds

    • An increase in the size of the leaves

    • Increased grwoth of ther terminal bud

    • An immediate flowering of the plant

    • An increase in the growth of the root systerm

    Correct Answer
    A. Increased growth of axillary buds
    Explanation
    Removing the terminal bud of a plant that shows apical dominance will cause increased growth of axillary buds. This is because the terminal bud suppresses the growth of axillary buds by producing a hormone called auxin. When the terminal bud is removed, the auxin concentration decreases, allowing the axillary buds to grow and develop into new branches. This leads to increased branching and overall growth of the plant.

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  • 35. 

    Annual rgrowth rings are formed in woody stems principally through the activities of the __.

    • Pericyle

    • Pith

    • Vascular cambium

    • Apical mersitem

    Correct Answer
    A. Vascular cambium
    Explanation
    Annual growth rings are formed in woody stems primarily through the activities of the vascular cambium. The vascular cambium is a layer of cells located between the xylem and phloem in the stem. It is responsible for the production of new xylem and phloem cells, which contribute to the growth of the stem in diameter. Each year, the vascular cambium produces a new layer of xylem and phloem cells, resulting in the formation of annual growth rings. These rings can be used to determine the age of a tree and provide information about its growth patterns.

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  • 36. 

    Which of the following options correctly lsits the seqence of structures through which water passes into a root?

    • Epidermis, endodermis, guard cell, xylem

    • Epidermis, cortex, endodermis, xylem

    • Root hair, xylem, endodermis, phloem

    • Guard cell, endodermis, cortex, xylem

    • Root hair, cortex, xylem, endodermis

    Correct Answer
    A. Epidermis, cortex, endodermis, xylem
  • 37. 

    The proes that facilitat gas exhange in platn leaves are called

    • Cuticles

    • Lenticles

    • Stomata

    • Plasmodesmata

    • Guard cells

    Correct Answer
    A. Stomata
    Explanation
    Stomata are the pores found on the surface of plant leaves that facilitate gas exchange. They allow for the exchange of carbon dioxide and oxygen with the surrounding environment, which is essential for photosynthesis and respiration. The other options listed, such as cuticles, lenticles, plasmodesmata, and guard cells, are not directly involved in gas exchange in plant leaves. Cuticles are waxy layers that help reduce water loss, lenticles are small openings in the bark of woody plants for gas exchange, plasmodesmata are channels that connect plant cells, and guard cells regulate the opening and closing of stomata.

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  • 38. 

    A seed develps from a(n)

    • Pollen grain

    • Fruit

    • Ovary

    • Sporophyte

    • Ovule

    Correct Answer
    A. Ovule
    Explanation
    The correct answer is ovule. An ovule is a structure found in the ovary of a flower that contains the female reproductive cells. It is the part of the flower that develops into a seed after fertilization. The other options, such as pollen grain, fruit, ovary, and sporophyte, are not directly involved in the development of a seed.

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  • 39. 

    The tallest plant on Earth is

    • A giant seed fern in southern Peru

    • 379 ft. redwood tree in California

    • A 500 ft kelp living off the coast of california

    • A 740 ft white oak tree in Illinois

    • A three mile sq sheet of red algae growing along the coastline of Alaska

    Correct Answer
    A. 379 ft. redwood tree in California
    Explanation
    The correct answer is the 379 ft. redwood tree in California. Redwood trees are known to be the tallest trees on Earth, with some reaching heights of over 300 feet. They are native to the coastal regions of California and Oregon and are able to grow to such great heights due to their unique ability to absorb large amounts of water from the foggy coastal air. The redwood tree mentioned in the answer is an example of the impressive height that these trees can reach.

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  • 40. 

    What is the speficif tern that refers to seasonal changes in the realitive lengths of nigth and day?

    • Ciradian rhythm

    • Photoperiod

    • Graviropism

    • Phototaxis

    • Chemotaxis

    Correct Answer
    A. Photoperiod
    Explanation
    The specific term that refers to seasonal changes in the relative lengths of night and day is photoperiod. Photoperiod refers to the duration of daily exposure to light and darkness, which varies throughout the year due to the tilt of the Earth's axis. This variation in photoperiod is responsible for triggering seasonal changes in plants, animals, and even human behavior.

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  • 41. 

    __________ is a parasitic plant.

    • Pitcher plant

    • Sundew

    • Venus' Flytrap

    • Dodder

    Correct Answer
    A. Dodder
    Explanation
    Dodder is a parasitic plant that belongs to the family Cuscutaceae. It lacks chlorophyll and therefore cannot produce its own food through photosynthesis. Instead, it attaches itself to the host plants and extracts nutrients and water from them. Dodder has thin, yellow or orange stems that twine around the host plant and small, scale-like leaves. It has specialized structures called haustoria that penetrate the host plant's tissues to obtain nutrients. Dodder is known for its ability to parasitize a wide range of plant species and can cause significant damage to crops and other plants.

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  • 42. 

    A female mulberry plant growing several miles away from male individuals of its nearest population can produce seeds without fertilization by

    • Parthenogensis

    • Tissue culture

    • Epigeal germination

    • Hypogeal germination

    Correct Answer
    A. Parthenogensis
    Explanation
    Parthenogenesis is a form of reproduction in which an egg develops into an individual without being fertilized by sperm. In the given scenario, the female mulberry plant is able to produce seeds without the need for fertilization by male individuals from its nearest population. This suggests that the plant is capable of undergoing parthenogenesis, allowing it to reproduce and produce offspring without the involvement of males.

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  • 43. 

    Which of the following substances induces "bolting" the rapid elongation of a stem in cabbage?

    • A gibberellin

    • Phytochrome

    • Ethylene

    • Abscisic acid

    • A cytokinin

    Correct Answer
    A. A gibberellin
    Explanation
    Gibberellin is a plant hormone that promotes stem elongation. In the case of cabbage, the application of gibberellin induces "bolting," which is the rapid elongation of the stem. This hormone stimulates cell division and elongation in the stem, leading to the rapid growth observed in bolting. Therefore, the presence of gibberellin in cabbage induces this specific response.

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  • 44. 

    A maple tree is an example of an___plant and corn is an exampel of An __plant.

    • Annual, biennial

    • Biennial, perennial

    • Perennial, annual

    • Perennial-biennial

    Correct Answer
    A. Perennial, annual
    Explanation
    A maple tree is an example of a perennial plant because it lives for many years, while corn is an example of an annual plant because it completes its life cycle in one year.

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  • 45. 

    Which of the following woudl be an essential macronutrient for plant growth?

    • Zinc

    • Iron

    • Copper

    • Phosphorus

    Correct Answer
    A. Phosphorus
    Explanation
    Phosphorus is an essential macronutrient for plant growth because it plays a crucial role in various physiological and metabolic processes. It is a key component of nucleic acids, ATP (adenosine triphosphate), and phospholipids, which are essential for energy transfer, DNA replication, and cell membrane structure. Phosphorus also plays a vital role in photosynthesis, nutrient uptake, and root development. Therefore, plants require an adequate supply of phosphorus to ensure healthy growth and development.

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  • 46. 

    White is a physical barrier in the root that regulates the flow of water to xylem via cell walls?

    • Phloem

    • Cortex

    • Epidermis

    • Plasmodesmata

    • Casparian strip

    Correct Answer
    A. Casparian strip
    Explanation
    The Casparian strip is a physical barrier in the root that regulates the flow of water to xylem via cell walls. It is a specialized structure found in the endodermis of plant roots. The Casparian strip is made up of suberin, a waxy substance that prevents water and solutes from freely crossing the cell walls of the endodermal cells. Instead, water and nutrients must pass through the selectively permeable plasma membranes of the endodermal cells, allowing for better control over the movement of substances into the xylem.

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  • 47. 

    Which of the following is a way that plants use animals as a defense against herbivores?

    • Production of an amino acid that harms herbivores

    • Coevolution between plants and predators

    • Production of hormones to induce acquired resistnace to herbivores

    • Release of microb-killing chemicals in response to infection

    • Attraction of wasps that kill herbivorous catepilliars

    Correct Answer
    A. Attraction of wasps that kill herbivorous catepilliars
    Explanation
    Plants use the attraction of wasps that kill herbivorous caterpillars as a defense against herbivores. By releasing chemicals or emitting specific scents, plants can attract wasps that are natural predators of herbivorous caterpillars. These wasps then prey on the caterpillars, reducing their population and protecting the plants from damage. This is an example of a biological control mechanism where plants utilize other organisms to defend against herbivores.

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  • 48. 

    Plant must be produced in largehormones

    • Must be produced in large quantities to be effective

    • Are rare and produced only in response to stress

    • Act on all cells they encounter

    • Are chemical signals that influence growth and development

    • Usually work independently of each other

    Correct Answer
    A. Are chemical signals that influence growth and development
    Explanation
    Plant hormones are chemical signals that play a crucial role in influencing the growth and development of plants. They are produced in large quantities to be effective in regulating various physiological processes such as cell division, elongation, and differentiation. These hormones act on all cells they encounter, coordinating the plant's response to environmental cues and promoting proper development. Although different hormones may have specific functions, they often work independently of each other to control different aspects of plant growth.

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  • 49. 

    Mimosa plants spread their leaflets during the day and fold them at night.  You decide to design an experiment to test whether mimosa's leaf movements are congrlled by a biological clock.  Which of the flowing experiments would test your hypothese

    • Growing the plants indoors and turing the lights on in the middle of the night. If a biological clock is conrolling leaf movement the leaves will open.

    • Put ting the paltnin a dark closet at nightfall. chekcon the plant in the morning at about 10 hours later, while the plant is till in the lcoset. if the leaves are open, a biological clock is indicated.

    Correct Answer
    A. Put ting the paltnin a dark closet at nightfall. chekcon the plant in the morning at about 10 hours later, while the plant is till in the lcoset. if the leaves are open, a biological clock is indicated.
    Explanation
    The correct answer is to put the plant in a dark closet at nightfall and check on it in the morning, about 10 hours later, while it is still in the closet. If the leaves are open, it indicates the presence of a biological clock. This experiment tests the hypothesis that mimosa's leaf movements are controlled by a biological clock by isolating the plant from external light cues and observing if the leaves still open and close in a rhythmic pattern.

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Quiz Review Timeline (Updated): Nov 29, 2023 +

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  • Current Version
  • Nov 29, 2023
    Quiz Edited by
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  • Oct 25, 2009
    Quiz Created by
    Akjohnson8363

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