Question

1) Nostoc and Anabaena have heterocysts for nitrogen fixation.
2) Cyanobacteria often form blooms in polluted water bodies.
3) Heterotrophic bacteria are more abundant in nature.
4) The cell walls of mycoplasma are made up of chitin.​

Answer 1

Answer:

4 is incorrect

Explanation:

All the above r right except 4.Because mycoplasmas have no cell wall.

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Answer 2

Answer:

dimaag se uper question