7th Grade Science Quiz: Trivia!
Are you familiar with 7th-grade science, and do you think you can pass this quiz? Science is a subject of study that builds and organizes knowledgeable explanations and predictions about the universe. Science can be very interesting for students in 7th grade, and this is typically the age at which they begin to perform lab experiments. If you are interested in science, this might be the quiz for you.
- 1.
The living parts of a habitat are:
- A.
Ecosystem
- B.
Niche
- C.
Abiotic factors
- D.
Population
- E.
Organisms
- F.
Biotic factors
- G.
Ecology
- H.
Habitat
- I.
Ecotone
- J.
Community
- K.
Species
- L.
Photosynthesis
Correct Answer
F. Biotic factorsExplanation
Biotic factors refer to the living components of a habitat. These include all the organisms, such as plants, animals, and microorganisms, that interact with each other and with the non-living components of the environment. Biotic factors play a crucial role in shaping the characteristics and dynamics of a habitat, as they contribute to the food web, nutrient cycling, and overall biodiversity. They also influence the population dynamics and interactions between different species within a community. Therefore, the correct answer is "Biotic factors."Rate this question:
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- 2.
A diagram that shows how much energy is available at each feeding level in an ecosystem is:
- A.
A food chain.
- B.
A food web.
- C.
The water cycle.
- D.
The energy pyramid.
Correct Answer
D. The energy pyramid.Explanation
An energy pyramid is a diagram that represents the flow of energy through different trophic levels in an ecosystem. It shows the amount of energy available at each feeding level, with the producers at the bottom and the top predators at the top. The pyramid shape represents the decrease in energy as it moves up the food chain, with only a small amount of energy being transferred from one level to the next. This diagram helps to illustrate the energy transfer and efficiency within an ecosystem.Rate this question:
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- 3.
An organism that obtains energy by feeding on other organisms is:
- A.
A decomposer.
- B.
A consumer.
- C.
A herbivore.
- D.
A producer.
Correct Answer
B. A consumer.Explanation
An organism that obtains energy by feeding on other organisms is called a consumer. Consumers are heterotrophs that rely on consuming other living organisms or their byproducts for energy. They can be further classified into different types based on their diet, such as herbivores (consume only plants), carnivores (consume only other animals), and omnivores (consume both plants and animals). Decomposers, on the other hand, obtain energy by breaking down dead organic matter, while producers are organisms that can produce their own energy through photosynthesis or chemosynthesis.Rate this question:
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- 4.
As you move up the food pyramid the amount of energy available to transfer is:
- A.
10%
- B.
50%
- C.
90%
- D.
20%
Correct Answer
A. 10%Explanation
As you move up the food pyramid, the amount of energy available to transfer decreases. This is because energy is lost at each trophic level through processes such as respiration, heat loss, and waste production. Only a small fraction of the energy from one trophic level is passed on to the next, resulting in a decrease in available energy. Therefore, the correct answer is 10%, indicating that only 10% of the energy is available for transfer as you move up the food pyramid.Rate this question:
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- 5.
Ecosystem organisms that break down wastes and dead organisms and return the raw materials to the ecosystem are:
- A.
Decomposers.
- B.
Consumers.
- C.
Omnivores.
- D.
Producers.
Correct Answer
A. Decomposers.Explanation
Decomposers are organisms that play a crucial role in the ecosystem by breaking down wastes and dead organisms. They help in the process of decomposition, breaking down complex organic matter into simpler forms and returning the raw materials back into the ecosystem. This recycling of nutrients is essential for the functioning of the ecosystem and the growth of other organisms. Consumers, omnivores, and producers do not perform the specific function of breaking down wastes and dead organisms, making decomposers the correct answer.Rate this question:
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- 6.
This is the the source of all food in an ecosystem:
- A.
Scavengers.
- B.
Decomposers.
- C.
Consumers.
- D.
Producers.
Correct Answer
D. Producers.Explanation
Producers are the source of all food in an ecosystem. They are organisms, such as plants and algae, that can convert sunlight into energy through the process of photosynthesis. This energy is then used to produce organic compounds, which serve as food for other organisms in the ecosystem. Without producers, there would be no food available for other organisms, including consumers, decomposers, and scavengers. Therefore, producers play a crucial role in sustaining the food chain and supporting the overall functioning of the ecosystem.Rate this question:
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- 7.
Flowering plants are called:
- A.
Monocot
- B.
Dicot
- C.
Hypocotyl
- D.
Angiosperm
Correct Answer
D. AngiospermExplanation
Angiosperm is the correct answer because it refers to flowering plants. Angiosperms are a group of plants that produce flowers and fruits, and they are the most diverse and dominant group of plants on Earth. The term "angiosperm" comes from the Greek words "angeion" meaning "vessel" and "sperma" meaning "seed," which refers to the enclosed seeds within the fruits produced by these plants. Therefore, angiosperm is the appropriate term to describe flowering plants.Rate this question:
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- 8.
Plant with two embryonic leaves are called:
- A.
Monocot
- B.
Dicot
- C.
Angiosperm
- D.
Brassica
Correct Answer
B. DicotExplanation
Plants with two embryonic leaves are called dicots. The term "dicot" is short for dicotyledon, which refers to the number of embryonic leaves, or cotyledons, present in the plant's seed. Dicots are a group of flowering plants characterized by having two cotyledons, net-veined leaves, and flower parts in multiples of four or five. This distinguishes them from monocots, which have only one cotyledon, parallel-veined leaves, and flower parts in multiples of three. Angiosperm is a broader term that refers to any flowering plant, while Brassica is a specific genus of plants that includes cabbage, broccoli, and other cruciferous vegetables.Rate this question:
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- 9.
The brightly-colored, structures that surround and hold a flower are called:
- A.
Petal
- B.
Anther
- C.
Style
- D.
Brassica
Correct Answer
A. PetalExplanation
The brightly-colored, structures that surround and hold a flower are called petals. Petals are often vibrant in color and serve to attract pollinators such as bees and butterflies. They are usually located inside the sepals, which are the outermost part of the flower. Petals play a crucial role in the reproductive process of flowering plants by helping to attract pollinators and aid in the transfer of pollen.Rate this question:
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- 10.
The embryonic-first seed leaves are called:
- A.
Cotyledon
- B.
Stamen
- C.
Anther
- D.
Sepal
Correct Answer
A. CotyledonExplanation
The embryonic-first seed leaves are called cotyledons. Cotyledons are part of the embryo in the seed of a plant and serve as a food source for the developing plant before it can perform photosynthesis. They are usually the first leaves to appear after germination and play a crucial role in providing nutrients for the young plant until it can establish its own source of energy through photosynthesis.Rate this question:
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- 11.
The part of the flower that holds up the pollen producing part are called:
- A.
Peduncle
- B.
Style
- C.
Carpel pistil
- D.
Filament
Correct Answer
D. FilamentExplanation
The filament is the correct answer because it is the part of the flower that holds up the pollen producing part, which is the anther. The filament is a long, slender stalk that connects the anther to the rest of the flower. It provides support for the anther and allows it to be positioned in a way that facilitates the transfer of pollen to pollinators.Rate this question:
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- 12.
The tip of a flower's male reproductive organ, contains pollen are called:
- A.
Stamen
- B.
Pistil
- C.
Anther
- D.
Stigmal
Correct Answer
C. AntherExplanation
The tip of a flower's male reproductive organ that contains pollen is called the anther. It is responsible for producing and releasing pollen grains, which are necessary for fertilization. The anther is a crucial part of the flower's reproductive process, as it ensures the transfer of pollen to the female reproductive organs for successful reproduction.Rate this question:
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- 13.
The female reproductive cell is called a/an:
- A.
Carpel/pistil
- B.
Ovule
- C.
Calyx
- D.
Ovary
Correct Answer
B. OvuleExplanation
The female reproductive cell is called an ovule. It is a structure found in the ovary of a flower and contains the egg cell. After fertilization, the ovule develops into a seed. The other options listed, such as carpel/pistil, calyx, and ovary, are all parts of the flower's reproductive system, but they do not specifically refer to the female reproductive cell.Rate this question:
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- 14.
The scientific name of a Wisconsin Fast Plant are called:
- A.
Brassica rapa
- B.
Hypocotyl
- C.
Dicot
- D.
Monocot
Correct Answer
A. Brassica rapaExplanation
Brassica rapa is the scientific name of the Wisconsin Fast Plant. This name is used to specifically identify and classify this particular plant species. It is important to use scientific names to avoid confusion and ensure accurate communication among scientists and researchers.Rate this question:
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- 15.
Identify the Flowering Plant Parts - ANot all words will be used.
- A.
Angiosperm
- B.
Calyx
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
G. StamenExplanation
The stamen is one of the male reproductive parts of a flowering plant. It consists of two main parts, the filament and the anther. The filament is a long, thin structure that holds up the anther, which is the part that produces pollen. The stamen plays a crucial role in the process of pollination, where the pollen is transferred from the anther to the female reproductive organs of the flower. Therefore, the stamen is an important component of the reproductive system of angiosperms, or flowering plants.Rate this question:
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- 16.
Identify the Flowering Plant Parts - BNot all words will be used.
- A.
Angiosperm
- B.
Calyx
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
H. AntherExplanation
The anther is the correct answer because it is a part of the flowering plant. The anther is the part of the stamen that produces and releases pollen.Rate this question:
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- 17.
Identify the Flowering Plant Parts - CNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
D. FilamentExplanation
The filament is part of the stamen, which is the male reproductive organ of a flowering plant. It is a long, slender structure that supports the anther, where pollen is produced. The filament plays a crucial role in the process of pollination, as it holds the anther in a position where it can easily release pollen onto visiting insects or other pollinators.Rate this question:
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- 18.
Identify the Flowering Plant Parts - DNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
R. PeduncleExplanation
The peduncle is the correct answer because it is a part of a flowering plant. The peduncle is the stalk that supports the flower, connecting it to the main stem or branch of the plant. It is responsible for holding the flower upright and providing it with nutrients and water from the plant's vascular system. The peduncle also helps in the process of pollination by elevating the flower to attract pollinators such as bees or butterflies.Rate this question:
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- 19.
Identify the Flowering Plant Parts - ENot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
K. PetalExplanation
The correct answer is "Petal." Petals are one of the parts of a flowering plant. They are often brightly colored and serve to attract pollinators such as bees and butterflies. Petals are located inside the calyx, which is the outermost whorl of the flower. They are usually soft and delicate in texture and can vary in shape and size depending on the plant species.Rate this question:
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- 20.
Identify the Flowering Plant Parts - FNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
M. StigmaExplanation
The stigma is the part of the flower that receives pollen during pollination. It is located at the top of the pistil, the female reproductive organ of the flower. The stigma is sticky or feathery in order to catch and hold onto pollen grains. Once the pollen lands on the stigma, it can then travel down the style and into the ovary to fertilize the ovules, leading to the formation of seeds.Rate this question:
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- 21.
Identify the Flowering Plant Parts - GNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
T. StyleExplanation
The style is a part of a flowering plant. It is a slender, elongated structure that connects the stigma to the ovary. The style plays a crucial role in the fertilization process as it provides a pathway for the pollen tube to grow and deliver the male gametes to the ovary. It is located in the center of the flower and is often surrounded by the stamen and the pistil.Rate this question:
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- 22.
Identify the Flowering Plant Parts - HNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
Q. OvaryExplanation
The ovary is the correct answer because it is one of the main parts of a flowering plant. The ovary is located at the base of the pistil/carpel and contains the ovules, which eventually develop into seeds after fertilization. The ovary plays a crucial role in reproduction as it protects and nourishes the developing seeds. Additionally, the ovary also develops into a fruit after fertilization in order to aid in seed dispersal.Rate this question:
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- 23.
Identify the Flowering Plant Parts - INot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Monocot
- J.
Petal
- K.
Pollen
- L.
Stigma
- M.
Brassica
- N.
Cotyledon
- O.
Hypocotyl
- P.
Ovary
- Q.
Peduncle
- R.
Sepal
- S.
Style
Correct Answer
E. OvuleExplanation
The ovule is a part of a flowering plant. It is located within the ovary and is responsible for producing and containing the female reproductive cells, known as eggs or female gametes. The ovule plays a crucial role in the process of fertilization, as it is where the male gametes (pollen) are received and the fusion of the male and female gametes occurs, resulting in the formation of seeds.Rate this question:
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- 24.
Identify the Flowering Plant Parts - JNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
S. SepalExplanation
The sepal is the correct answer because it is one of the parts of a flowering plant. The sepal is the outermost part of the flower and is usually green in color. It protects the flower bud before it opens and often resembles small leaves. The sepal is important for protecting the developing flower and plays a role in attracting pollinators.Rate this question:
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- 25.
Identify the Flowering Plant Parts - KNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
F. Pistil/carpelExplanation
The pistil/carpel is the female reproductive organ of a flowering plant. It consists of three main parts: the stigma, style, and ovary. The stigma is the sticky tip of the pistil where pollen grains land and germinate. The style is a long tube that connects the stigma to the ovary. The ovary contains the ovules, which are the structures that develop into seeds after fertilization. The pistil/carpel plays a crucial role in the reproduction of flowering plants by receiving pollen and facilitating fertilization.Rate this question:
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- 26.
Identify the Flowering Plant Parts - LNot all words will be used.
- A.
Angiosperm
- B.
Dicot
- C.
Filament
- D.
Ovule
- E.
Pistil/carpel
- F.
Stamen
- G.
Anther
- H.
Egg
- I.
Monocot
- J.
Petal
- K.
Pollen
- L.
Stigma
- M.
Brassica
- N.
Cotyledon
- O.
Hypocotyl
- P.
Ovary
- Q.
Peduncle
- R.
Sepal
- S.
Style
- T.
Calyx
Correct Answer
T. CalyxExplanation
The calyx is the outermost part of a flower, consisting of sepals. It protects the developing flower bud and supports the petals when they open. The calyx is usually green in color and can be seen at the base of the flower.Rate this question:
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- 27.
Identify the Flowering Plant Parts - MNot all words will be used.
- A.
Calyx
- B.
Angiosperm
- C.
Dicot
- D.
Filament
- E.
Ovule
- F.
Pistil/carpel
- G.
Stamen
- H.
Anther
- I.
Egg
- J.
Monocot
- K.
Petal
- L.
Pollen
- M.
Stigma
- N.
Brassica
- O.
Cotyledon
- P.
Hypocotyl
- Q.
Ovary
- R.
Peduncle
- S.
Sepal
- T.
Style
Correct Answer
L. PollenExplanation
Pollen is the correct answer because it is a crucial part of the reproductive process in flowering plants. Pollen contains the male gametes, or sperm cells, which are necessary for fertilization. It is produced in the anther, which is located on the stamen, and is transferred to the stigma of the pistil/carpel. From there, the pollen tube grows and allows the sperm cells to reach the ovule, where fertilization occurs. Therefore, pollen plays a vital role in the sexual reproduction of flowering plants.Rate this question:
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- 28.
Identify the approximate age of this Wisconsin Fast Plant:
- A.
This Wisconsin Fast Plant is 4-5 days old.
- B.
This Wisconsin Fast Plant is 48-72 hours old.
- C.
This Wisconsin Fast Plant is 24-28 hours old.
- D.
This Wisconsin Fast Plant is 9-10 days old.
Correct Answer
A. This Wisconsin Fast Plant is 4-5 days old.Explanation
The approximate age of the Wisconsin Fast Plant can be identified as 4-5 days old based on the given information. The other options of 48-72 hours, 24-28 hours, and 9-10 days do not match the given age range.Rate this question:
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- 29.
There usually are few organisms at the highest level of a food web because:
- A.
The amount of energy at the producer level limits the number of consumers that the ecosystem can support.
- B.
The amount of energy available to consumers is shared.
- C.
There are more decomposers.
- D.
The energy is transferred.
Correct Answer
A. The amount of energy at the producer level limits the number of consumers that the ecosystem can support.Explanation
The correct answer is that the amount of energy at the producer level limits the number of consumers that the ecosystem can support. This is because energy is transferred between trophic levels in a food web, and each level loses energy in the form of heat or waste. As a result, there is less energy available for higher-level consumers, which limits their population size. This is known as the 10% rule, where only about 10% of the energy from one trophic level is transferred to the next. Therefore, there are usually fewer organisms at the highest level of a food web due to the limited energy available.Rate this question:
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- 30.
An environmental factor that causes a population to decrease is a ____________.
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
B. Limiting factorExplanation
A limiting factor is an environmental factor that restricts the growth or survival of a population. It can include factors such as availability of resources (such as food, water, or space), competition, predation, disease, or unfavorable weather conditions. When a population exceeds the capacity of these limiting factors, it can lead to a decrease in population size.Rate this question:
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- 31.
Changes in population may occur when a group moves into a population. This is called:
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
M. ImmigrationExplanation
When a group moves into a population, it leads to changes in population, which is known as immigration. Immigration refers to the movement of individuals into a population from another area or habitat. This can result in an increase in the population size and can have various effects on the ecosystem, such as competition for resources and changes in species composition.Rate this question:
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- 32.
Counting all the members of a ___________ is a method of __________________.
- A.
Population and direct observation
- B.
Birth rate and population
- C.
Population and indirect observation
- D.
Death rate and population density
Correct Answer
A. Population and direct observationExplanation
Counting all the members of a population is a method of directly observing the population. This involves physically counting or surveying every individual in the population to determine its size. This method provides an accurate and reliable measure of the population size, as it directly accounts for every member. Other methods, such as indirect observation or estimation, may introduce errors or uncertainties in the population count. Therefore, population and direct observation is the correct answer for this question.Rate this question:
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- 33.
If the death rate in a population is greater than the birth rate:
- A.
The population will generally decrease.
- B.
The population will remain the same.
- C.
The population will increase.
- D.
The birth rate will rise.
Correct Answer
A. The population will generally decrease.Explanation
If the death rate in a population is greater than the birth rate, it means that more individuals are dying than being born. This leads to a decrease in the overall population size over time. With fewer individuals being born to replace those who are dying, the population gradually decreases.Rate this question:
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- 34.
Identify this method of estimating populations: Red wolves are tagged, released and checked systematically.
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
L. Mark and recaptureExplanation
The method described in the question, where red wolves are tagged, released, and checked systematically, is known as mark and recapture. This method involves marking a sample of individuals, releasing them back into the population, and then recapturing a second sample to estimate the total population size. By comparing the number of marked individuals in the second sample to the total number of individuals in the second sample, scientists can estimate the population size.Rate this question:
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- 35.
When might an ecologist use indirect observation to estimate a population?
- A.
Indirect observation may be used when a population is small or difficult to find.
- B.
Indirect observation may be used when a population is located in a remote area that the scientist cannot get to.
- C.
Indirect observation may be used to mark and recapture organisms.
- D.
Indirect observation may be used for sampling.
Correct Answer
A. Indirect observation may be used when a population is small or difficult to find.Explanation
An ecologist might use indirect observation to estimate a population when the population is small or difficult to find. This method allows the ecologist to gather data without directly observing the organisms, which can be challenging if the population is elusive or hard to access. By using indirect observation techniques, such as analyzing tracks, nests, or feces, the ecologist can make inferences about the population size and behavior. This approach is particularly useful when studying rare or endangered species or when working in remote areas where direct observation is impractical.Rate this question:
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- 36.
What does the basic formula for mark and recapture mean?
- A.
The population sample equals the number marked multiplied by the sum of the unmarked and recaptured divided by the number recaptured
- B.
The population sample equals the number marked minus the sum of the unmarked and recaptured divided by the number recaptured.
- C.
The population sample equals the number marked divided by the number recaptured
- D.
The population sample equals the number unmarked plus the recaptured divided by the number recaptured
Correct Answer
A. The population sample equals the number marked multiplied by the sum of the unmarked and recaptured divided by the number recapturedExplanation
The basic formula for mark and recapture means that the population sample is equal to the number of marked individuals multiplied by the sum of the unmarked and recaptured individuals, divided by the number of recaptured individuals. This formula is used to estimate the size of a population by marking a certain number of individuals, releasing them back into the population, and then recapturing a portion of the population later on. By analyzing the ratio of marked to unmarked individuals in the recaptured sample, scientists can estimate the total population size.Rate this question:
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- 37.
One method of estimating population size is to count the number of organisms in a small area. This gives a _________ number and then apply multiples of that area to the larger area to estimate the population.
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
P. SampleExplanation
One method of estimating population size is to count the number of organisms in a small area. This gives a sample number and then apply multiples of that area to the larger area to estimate the population.Rate this question:
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- 38.
What does a negative growth rate mean?
- A.
The population is declining.
- B.
The population will remain the same.
- C.
The population will increase.
- D.
The population is endangered.
Correct Answer
A. The population is declining.Explanation
A negative growth rate means that the population is declining. This indicates that the number of individuals in the population is decreasing over time. It can be due to factors such as a decrease in birth rates, an increase in death rates, or migration out of the population. Overall, a negative growth rate suggests a decrease in the population size.Rate this question:
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- 39.
A mouse, raccoon and hawk are all members of the same:
- A.
Species
- B.
Niche
- C.
Community
- D.
Population
Correct Answer
C. CommunityExplanation
A community refers to a group of different species that live and interact with each other in the same area. In this case, the mouse, raccoon, and hawk are all different species that coexist and interact within their shared habitat, making them members of the same community.Rate this question:
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- 40.
All of the following are examples of limiting factors except:
- A.
Time
- B.
Food & water
- C.
Space
- D.
Weather
Correct Answer
A. TimeExplanation
The given options represent different limiting factors that can affect the growth or survival of organisms. Time, however, is not typically considered a limiting factor in the same way as the other options. While time can certainly impact organisms in various ways, such as affecting their life cycles or reproductive rates, it is not usually categorized as a limiting factor in the same sense as factors like food, water, space, or weather.Rate this question:
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- 41.
Population can change in size when:
- A.
The birth rate equals the death rate
- B.
Emigration rate equals birth rate
- C.
When new members join the population or when members leave the population
- D.
None of these
Correct Answer
C. When new members join the population or when members leave the populationExplanation
The correct answer is when new members join the population or when members leave the population. This is because population size can increase when new individuals are born or immigrate into the population, and it can decrease when individuals die or emigrate out of the population. The other options mentioned, such as the birth rate equaling the death rate or the emigration rate equaling the birth rate, may or may not result in a change in population size depending on the specific values of these rates.Rate this question:
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- 42.
The largest population that an area can support is called:
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
H. Carrying capacityExplanation
Carrying capacity refers to the maximum number of individuals of a species that an environment can sustainably support. It takes into account factors such as the availability of resources like food, water, and space, as well as the impact of limiting factors such as competition, predation, and disease. When a population surpasses the carrying capacity of its environment, it may result in resource depletion, increased competition, and population decline. Therefore, the correct answer is carrying capacity.Rate this question:
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- 43.
The number of individuals in an area of a specific size:
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
G. Population densityExplanation
Population density refers to the number of individuals in a given area of a specific size. It is a measure of how crowded or dense a population is within a particular area. This can be calculated by dividing the total population of an area by its land area. Population density is an important concept in ecology as it helps to understand the distribution and abundance of organisms in different habitats. It can also provide insights into the availability of resources, competition, and the overall health of a population.Rate this question:
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- 44.
The study of the living things and how they interact is called:
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
K. EcologyExplanation
Ecology is the study of the living things and how they interact with each other and their environment. It involves studying the relationships between organisms, their habitats, and the resources they rely on. This field of study helps us understand the balance and dynamics of ecosystems and how human activities can impact them.Rate this question:
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- 45.
When groups leave or are separated from their organism population to pursue a need, it is called:
- A.
Direct observation
- B.
Limiting factor
- C.
Birth rate
- D.
Population
- E.
Indirect observation
- F.
Death rate
- G.
Population density
- H.
Carrying capacity
- I.
Estimate
- J.
Emigration
- K.
Ecology
- L.
Mark and recapture
- M.
Immigration
- N.
Space
- O.
Food
- P.
Sample
- Q.
Weather
- R.
Water
Correct Answer
J. EmigrationExplanation
Emigration refers to the movement of individuals or groups leaving their population to pursue a need. This term specifically describes the action of leaving, rather than the observation or measurement of population characteristics.Rate this question:
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- 46.
Identify: What day is this image in the Wisconsin Fast Plant cycle? How do you know?
- A.
This is day 18-19 in the Wisconsin Fast Plant cycle because the flower has seed pods growing.
- B.
This is day 28-29 in the Wisconsin Fast Plant cycle because the flower seed pods are decaying.
- C.
This is day 6- i8n the Wisconsin Fast Plant cycle because the cotyledon has seed pods.
- D.
This is day 12-14 in the Wisconsin Fast Plant cycle because the flower is developing.
Correct Answer
A. This is day 18-19 in the Wisconsin Fast Plant cycle because the flower has seed pods growing.Explanation
The correct answer is day 18-19 in the Wisconsin Fast Plant cycle because the flower has seed pods growing. This can be inferred from the statement that "the flower has seed pods growing."Rate this question:
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- 47.
Identify: 6CO2 in the photosynthesis equation: Sunlight 6CO2 + 6H2O → C6H12O6 + O2
- A.
6CO2 is sugar (glucose)
- B.
6CO2 is carbon dioxide
- C.
6CO2 is sugar and water
- D.
6CO2 is chlorophyll
Correct Answer
B. 6CO2 is carbon dioxideExplanation
The equation provided represents the process of photosynthesis, where carbon dioxide (CO2) is converted into glucose (C6H12O6) and oxygen (O2) in the presence of sunlight. Therefore, 6CO2 in the equation refers to 6 molecules of carbon dioxide.Rate this question:
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- 48.
Identify each labeled part of the dicot seed anatomy: Part # 8
- A.
Number 8 is the radicle.
- B.
Number 8 is the micropyle.
- C.
Number 8 is the embryo.
- D.
Number 8 is the hilum.
- E.
Number 8 is the testa.
- F.
Number 8 is the cotyledon.
- G.
Number 8 is the plumule.
Correct Answer
A. Number 8 is the radicle. -
- 49.
Identify each labeled part of the dicot seed anatomy: Part # 2
- A.
Number 2 is the cotyledon.
- B.
Number 2 is the micropyle.
- C.
Number 2 is the embryo.
- D.
Number 2 is the hilum.
- E.
Number 2 is the testa.
- F.
Number 2 is the radicle.
- G.
Number 2 is the plumule.
- H.
Number 2 is the hypercotyl.
Correct Answer
C. Number 2 is the embryo.Explanation
The correct answer is "Number 2 is the embryo." In a dicot seed, the embryo is the part that develops into a new plant. It consists of the radicle (embryonic root) and the plumule (embryonic shoot). The embryo is surrounded by the testa, which is the seed coat. The cotyledons, which are the seed leaves, are also part of the embryo. The hilum is the scar on the seed where it was attached to the plant, and the micropyle is the small opening through which water and air enter the seed. The hypercotyl is not a part of the dicot seed anatomy.Rate this question:
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- 50.
Identify each labeled part of the dicot seed anatomy: Part # 6
- A.
Number 6 is the cotyledon.
- B.
Number 6 is the micropyle.
- C.
Number 6 is the embryo.
- D.
Number 6 is the hilum.
- E.
Number 6 is the testa.
- F.
Number 6 is the radicle.
- G.
Number 6 is the plumule.
- H.
Number 6 is the hypercotyl.
Correct Answer
A. Number 6 is the cotyledon.Explanation
The correct answer is that number 6 is the cotyledon. The cotyledon is a part of the dicot seed anatomy and is responsible for storing and providing nutrients to the developing embryo. It is typically the first leaf-like structure that emerges from the seed upon germination.Rate this question:
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.jpg "Identify each labeled part of the dicot seed anatomy: Part # 2")
.jpg "Identify each labeled part of the dicot seed anatomy: Part # 6")
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