A) euphotic, disphotic and aphotic
B) aphotic, euphotic and disphotic
C) euphotic, aphotic and disphotic
D) euphotic, disphotic and aphotic
Correct Answer: A
Solution :
Euphotic zone (where sufficient light penetrates) is responsible for main bulk of primary production. Below this is disphotic zone where no effective plant production occurs. The lightless region below the dysphotic zone is termed aphotic zone.
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