Cyanobacteria are also known as

A. Autotrophic bacteria

B. Blue Green Algae

C. Red Brown Algae

D. None of the above

Answer: Option B

Solution(By Examveda Team)

Cyanobacteria, also known as blue-green bacteria, blue-green algae, and Cyanophyta, is a phylum of bacteria that obtain their energy through photosynthesis.

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Ozone hole refers to

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C. decrease in thickness of ozone layer in stratosphere

D. increase in the thickness of ozone layer in troposphere