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An Intiative by Sri Chaitanya
a
Atleast one half of the total CO2, fixation on earth is carried out by algae through photosynthesis
b
Being photosynthetic they increase the level of dissolved oxygen in their immediate environment
c
They are of paramount importance as primary producers which form the basis of food cycles of all aquatic animals
d
All have flagellated gametes
answer is D.
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