Blue green algae possess chlorophlyll along with a pigment known as

A. Chlorophy

B. Phycobilin

C. Haemoglobin

D. None of the above

Answer: Option B

Solution(By Examveda Team)

Blue-green Algae, now known as Cyanobacteria, are named for the blue-green pigment phycocyanin which along with chlorophyll a gives them a blue-green appearance. In the marine environment some Cyanobacteria trap and bind together sediment while they simultaneously precipitate carbonate.

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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