A) purify the atmosphere
B) are large in number
C) are used in fermentation
D) are used to study respiration
Correct Answer: A
Solution :
Algae are a group of unicellular (such as Chlamydomonas) or multicellular (such as Chara) group of eukaryotic autotrophic plants. Maximum solar energy is trapped by algae which are used in the process of photosynthesis, a process which requires \[C{{O}_{2}}\] as an accessory component and releases lifesaving \[{{O}_{2}}\] gas. Hence, algae are useful in purifying the atmosphere.
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