Maximum contribution of O₂ is from

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12.Ecosystem

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Maximum contribution of $O_2$ is from

A

Phytoplankton

B

Grasslands

C

Herbs and shrubs

D

Dense forest

(AIPMT-1989)

Solution

(a)Major source of $O_2$ liberation is photosynthesis and about $90\% $ of total photosynthesis is done by phytoplankton.

Standard 12

Biology

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