Assertion: Nostoc is a photosynthetic autotroph.
Reason: Nostoc can fix atmospheric nitrogen in heterocysts.
Cyanobacteria have photosynthetic pigments like chlorophyll a and hence are photoautotrophs. They have heterocysts meant for nitrogen fixation.
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Read the following statements and identify the organisms.
(a) They have chlorophyll a similar to green plants.
(b) They often form blooms in polluted water bodies.
(c) They can fix atmospheric nitrogen.
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