Botany 200 Final Algae

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Algae Quizzes & Trivia

Botany final material algae ppt questions


Questions and Answers
  • 1. 

    ________ is sexual reproduction or union of gametes in algae. 

    Explanation
    Syngamy refers to the sexual reproduction or union of gametes in algae. This process involves the fusion of two gametes, typically a male and a female, to form a zygote. Syngamy is an essential step in the life cycle of algae and enables genetic variation through the combination of genetic material from two parents.

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  • 2. 

    Photo autotrophs are the top of the marine food chain 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    they are the basis of marine food chain

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  • 3. 

    Photo autotrophs are responsible for how much of the oxygen on earth 

    • A.

      30 to 50%

    • B.

      50 to 60%

    • C.

      60 to 70%

    Correct Answer
    B. 50 to 60%
    Explanation
    Photoautotrophs, such as plants and algae, use sunlight to convert carbon dioxide and water into glucose and oxygen through the process of photosynthesis. This oxygen is released into the atmosphere, contributing to the oxygen levels on Earth. It is estimated that photoautotrophs are responsible for producing around 50 to 60% of the oxygen present in the atmosphere.

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  • 4. 

    Diatoms and brown algae belong to this group 

    • A.

      Chlorophyta

    • B.

      Alveolates

    • C.

      Stramenopiles

    • D.

      None of the above

    Correct Answer
    C. Stramenopiles
    Explanation
    Diatoms and brown algae belong to the group called stramenopiles. Stramenopiles are a diverse group of protists that have unique hair-like projections on their flagella. Diatoms are single-celled organisms that have a silica cell wall and play a significant role in the ocean's food chain. Brown algae, on the other hand, are multicellular organisms commonly found in marine environments and include kelp and seaweed. Both diatoms and brown algae are classified under stramenopiles due to their shared characteristics and evolutionary relationships.

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  • 5. 

    Diatoms have what type of unicells 

    • A.

      Symmetrical

    • B.

      Large

    • C.

      Round

    Correct Answer
    A. Symmetrical
    Explanation
    Diatoms are a type of unicellular algae that have symmetrical cells. They possess a unique cell wall made of silica, which gives them a distinct shape and symmetry. This symmetrical structure allows diatoms to efficiently float and move in aquatic environments. Additionally, their symmetrical cells enable them to undergo cell division and reproduce effectively.

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  • 6. 

    _________ are 2 halves of a cell wall 

    Correct Answer
    frustules
    Explanation
    Frustules are the correct answer because they are indeed two halves of a cell wall. Frustules are the rigid, silica-based shells that make up the cell walls of diatoms, a type of algae. These shells consist of two overlapping halves, or valves, that fit together like a box and lid. The frustules provide protection and support to the diatom cells, while also allowing them to maintain their shape and structure.

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  • 7. 

    Diatoms and brown algae (stramenopiles) are found where 

    • A.

      Fresh water

    • B.

      Salt water

    • C.

      Coastal waters

    • D.

      All of the above

    • E.

      Just a and c

    Correct Answer
    E. Just a and c
    Explanation
    Diatoms and brown algae (stramenopiles) are found in both fresh water and coastal waters. This is because these organisms are adapted to thrive in a wide range of aquatic environments, including both freshwater habitats such as lakes and rivers, as well as coastal waters where the salinity can vary. Therefore, the correct answer is "just a and c" which refers to fresh water and coastal waters.

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  • 8. 

    Diatomaceous earth is sedimentary rock made from algae skeletons 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    it is made from diatom skeletons

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  • 9. 

    The brown color in brown algae comes from what carotenoid 

    • A.

      Fucoxanthin

    • B.

      Sarassum

    • C.

      Phycoerythria

    Correct Answer
    A. Fucoxanthin
    Explanation
    Fucoxanthin is a carotenoid that gives brown algae its characteristic brown color. Carotenoids are pigments found in plants and algae that are responsible for the various colors seen in nature. In the case of brown algae, fucoxanthin is the predominant carotenoid and is responsible for absorbing light energy for photosynthesis. This pigment not only gives brown algae its brown color, but it also plays a vital role in capturing sunlight and converting it into chemical energy.

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  • 10. 

    What facts about algin are true 

    • A.

      Thickens ice cream

    • B.

      Is a 60 million/year industry

    • C.

      Is added into toothpaste, cosmetics, soaps and paint

    • D.

      Is not a sustainable harvest

    • E.

      Is used for fertilizer

    • F.

      Is a 40 million/year industry

    Correct Answer(s)
    A. Thickens ice cream
    C. Is added into toothpaste, cosmetics, soaps and paint
    F. Is a 40 million/year industry
    Explanation
    Algin is a substance that is used to thicken ice cream and is added into toothpaste, cosmetics, soaps, and paint. It is also mentioned that it is a 40 million/year industry. There is no mention of it being a 60 million/year industry or being used for fertilizer. Therefore, the facts that are true about algin are that it thickens ice cream, is added into toothpaste, cosmetics, soaps, and paint, and it is a 40 million/year industry.

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  • 11. 

    Red algae is unicellular 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    red algae is multicellular

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  • 12. 

    The red color in red algae comes from what photosynthetic pigment 

    • A.

      Phycoerythria

    • B.

      Phaeophyta

    • C.

      Fucoxanthin

    • D.

      Sarassum

    Correct Answer
    A. Phycoerythria
    Explanation
    The red color in red algae comes from the photosynthetic pigment called Phycoerythria. This pigment absorbs blue and green light and reflects red light, giving the algae their characteristic red color.

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  • 13. 

    Red algae is used in soups, carrageenan, and agar 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Red algae is indeed used in soups, carrageenan, and agar. Red algae, also known as Rhodophyta, are commonly used in various food products. Carrageenan, a food additive extracted from red algae, is used as a thickening and stabilizing agent in soups, ice creams, and other processed foods. Agar, another substance derived from red algae, is used as a gelling agent in desserts, jellies, and other food products. Therefore, the statement that red algae is used in soups, carrageenan, and agar is true.

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  • 14. 

    Where does red algae live check all that apply 

    • A.

      Oceans

    • B.

      Shallow tide pools

    • C.

      Salt water

    Correct Answer(s)
    A. Oceans
    B. Shallow tide pools
    C. Salt water
    Explanation
    Red algae can be found in oceans, shallow tide pools, and saltwater environments. These types of algae are well adapted to living in marine habitats and can thrive in various conditions within these environments. They are commonly found in coastal areas and can be seen in both deep and shallow waters, including tide pools. Additionally, red algae are able to tolerate and thrive in saltwater, making them well-suited for living in the ocean.

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  • 15. 

    Red algae is able to change the relative amounts of photosynthetic pigments depending on the light conditions to maximize outcome of PSN

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Red algae is capable of adjusting the proportions of photosynthetic pigments based on the availability of light. By doing so, they can optimize the process of photosynthesis (PSN) and maximize its efficiency. This adaptive mechanism allows red algae to thrive in different light conditions and enhance their ability to convert sunlight into energy. Therefore, the statement is true.

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  • 16. 

    An example of an alveolate is 

    • A.

      Chlorophyta

    • B.

      Multicellular organism

    • C.

      Dinoflagellate

    Correct Answer
    C. Dinoflagellate
    Explanation
    Dinoflagellates are a type of alveolate. They are single-celled organisms that belong to the phylum Dinoflagellata. These organisms have a characteristic shape and are known for their ability to move using two flagella. They can be found in both marine and freshwater environments. Dinoflagellates are important members of marine ecosystems as they are primary producers and play a vital role in the food chain. They also have the ability to undergo harmful algal blooms, which can have detrimental effects on the environment and other organisms.

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  • 17. 

    Dinoflagellates are important primary producers in the oceans 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Dinoflagellates are single-celled organisms found in marine environments. They are known for their ability to perform photosynthesis, making them important primary producers in the oceans. Through photosynthesis, dinoflagellates convert sunlight and carbon dioxide into organic compounds, providing a food source for other organisms in the marine food chain. Their role as primary producers is crucial in maintaining the balance of marine ecosystems, making the statement "dinoflagellates are important primary producers in the oceans" true.

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  • 18. 

    Red tides are toxic to animals living in them 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Red tides are caused by harmful algal blooms that release toxins into the water, making them toxic to animals living in them. These toxins can harm or even kill marine life such as fish, shellfish, and marine mammals. Therefore, it is true that red tides are toxic to animals living in them.

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  • 19. 

    Alveolates are...

    • A.

      Autotrophs

    • B.

      Heterotrophs

    • C.

      Both

    Correct Answer
    C. Both
    Explanation
    Alveolates are classified as both autotrophs and heterotrophs. This means that they have the ability to produce their own food through photosynthesis (autotrophs) and also obtain nutrients by consuming other organisms (heterotrophs). The ability to switch between these two modes of nutrition allows alveolates to adapt to different environments and ensure their survival.

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  • 20. 

    Chlorophyta and streptophytes are 

    • A.

      Green algae

    • B.

      Brown algae

    • C.

      Red algae

    Correct Answer
    A. Green algae
    Explanation
    Chlorophyta and streptophytes are classified as green algae because they contain chlorophyll, which gives them their green color. Green algae are photosynthetic organisms that can be found in various habitats, including freshwater and marine environments. They are characterized by their ability to convert sunlight into energy through photosynthesis, similar to plants. Chlorophyta and streptophytes are both examples of green algae, belonging to the phylum Chlorophyta.

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  • 21. 

    Coleochaetales (stoneworts) and Charales are closest related to land plants 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Coleochaetales (stoneworts) and Charales are closest related to land plants. This is because both Coleochaetales and Charales are members of the Charophyta, a group of green algae that share several characteristics with land plants. These include the presence of a complex multicellular body, cell walls made of cellulose, and similar reproductive structures. The close relationship between these algae and land plants suggests that they share a common ancestor and provides insight into the evolutionary transition from aquatic to terrestrial environments.

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  • 22. 

    Green algae have what kind of relationship with fungi - lichen

    • A.

      Paracitic

    • B.

      Smybiotic

    • C.

      No relation

    Correct Answer
    B. Smybiotic
    Explanation
    Green algae have a symbiotic relationship with fungi in the form of lichens. Lichens are composite organisms where green algae and fungi live together in a mutually beneficial partnership. The algae provide food through photosynthesis, while the fungi provide a protective structure and absorb water and nutrients from the environment. This symbiotic relationship allows both organisms to thrive in various habitats, such as rocks, trees, and soil.

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  • 23. 

    Euglenoids are a clade of ______ protists with fagella

    • A.

      Unicellular

    • B.

      Multicellular

    • C.

      Bicellular

    Correct Answer
    A. Unicellular
    Explanation
    Euglenoids are a clade of protists that possess flagella. Protists are a diverse group of eukaryotic microorganisms that can be either unicellular or multicellular. However, in the case of euglenoids, they are specifically classified as unicellular protists. This means that they exist as single-celled organisms, capable of independent movement using their flagella.

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  • 24. 

    All Euglena species are heterotrophic 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    many Euglena species are heterotrophic others are photo autotrophs

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  • 25. 

    ________ Euglena become ________ in the dark, and they resume their __________ behavior when returned to light 

    • A.

      Autotrophic, heterotrophic, autotrophic

    • B.

      Heterotrophic, autotrophic, heterotrophic

    • C.

      Autotrophic, heterotrophic, heterotrophic

    Correct Answer
    A. Autotrophic, heterotrophic, autotrophic
    Explanation
    Euglena are organisms that have the ability to perform both autotrophic and heterotrophic behaviors. In the presence of light, they are able to carry out photosynthesis and produce their own food, making them autotrophic. However, in the absence of light, they are unable to perform photosynthesis and switch to a heterotrophic mode of obtaining nutrients by consuming other organic matter. When they are returned to light, they are able to resume their autotrophic behavior and produce their own food again. Therefore, the correct answer is autotrophic, heterotrophic, autotrophic.

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  • 26. 

    What part of a euglenoid propels it? 

    • A.

      Contractile vacuole

    • B.

      Polysaccharides

    • C.

      Fagella

    Correct Answer
    C. Fagella
    Explanation
    The correct answer is flagella. Flagella are whip-like structures that protrude from the cell membrane of euglenoids and other organisms, allowing them to move and propel themselves through their environment. Contractile vacuoles, on the other hand, are responsible for regulating the water balance within the cell, and polysaccharides are complex carbohydrates that serve various functions in cells, but they are not involved in propulsion.

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