Q. What is the main component of the cell wall in green algae?
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A.
Cellulose
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B.
Chitin
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C.
Silica
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D.
Pectin
Solution
Cellulose is the main component of the cell wall in green algae.
Correct Answer:
A
— Cellulose
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Q. What is the main role of algae in aquatic ecosystems?
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A.
Decomposers
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B.
Producers
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C.
Consumers
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D.
Predators
Solution
Algae serve as primary producers, converting sunlight into energy through photosynthesis.
Correct Answer:
B
— Producers
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Q. What is the primary method of reproduction in most algae?
-
A.
Binary fission
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B.
Budding
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C.
Fragmentation
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D.
Sexual reproduction
Solution
Binary fission is the primary method of asexual reproduction in most algae.
Correct Answer:
A
— Binary fission
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Q. What is the primary photosynthetic pigment found in most algae?
-
A.
Chlorophyll a
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B.
Carotenoids
-
C.
Phycobilins
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D.
Xanthophylls
Solution
Chlorophyll a is the primary pigment used in photosynthesis by most algae.
Correct Answer:
A
— Chlorophyll a
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Q. What is the term for the symbiotic relationship between algae and fungi?
-
A.
Mycorrhiza
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B.
Lichen
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C.
Endophyte
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D.
Biofilm
Solution
Lichen is the term for the symbiotic relationship between algae and fungi.
Correct Answer:
B
— Lichen
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Q. Which algae are primarily responsible for oxygen production in oceans?
-
A.
Dinoflagellates
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B.
Coccolithophores
-
C.
Diatoms
-
D.
Green algae
Solution
Diatoms are a major group of algae that contribute significantly to oxygen production in marine environments.
Correct Answer:
C
— Diatoms
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Q. Which of the following is a characteristic of red algae?
-
A.
Contain chlorophyll a and c
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B.
Have a red pigment called phycoerythrin
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C.
Are primarily freshwater species
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D.
Lack cell walls
Solution
Red algae contain a red pigment called phycoerythrin, which gives them their color.
Correct Answer:
B
— Have a red pigment called phycoerythrin
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Q. Which of the following is a common use of algae in the food industry?
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A.
Thickening agent
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B.
Preservative
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C.
Flavor enhancer
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D.
Coloring agent
Solution
Algae, particularly carrageenan from red algae, is commonly used as a thickening agent in food products.
Correct Answer:
A
— Thickening agent
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Q. Which type of algae is known for its high oil content and potential as a biofuel source?
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A.
Red algae
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B.
Green algae
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C.
Brown algae
-
D.
Blue-green algae
Solution
Green algae are known for their high oil content, making them a potential source for biofuels.
Correct Answer:
B
— Green algae
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Q. Which type of algae is known for producing harmful algal blooms?
-
A.
Green algae
-
B.
Red algae
-
C.
Blue-green algae
-
D.
Brown algae
Solution
Blue-green algae, or cyanobacteria, are known for producing harmful algal blooms.
Correct Answer:
C
— Blue-green algae
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