Question

Assertion :In open water zone upto the depth to which light can penetrate, called photic zone. Reason: The photic zone is categorised into euphotic and disphotic zone.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

• The layer of the ocean that receives light is called the photic zone. It is categorized into the euphotic and disphotic zone.
• Euphotic zone is the uppermost layer of the ocean where sufficient light for photosynthesis is found.
• The zone where insufficient light for photosynthesis is found is called disphotic zone. In the photic zone, almost all the autotrophs in water access the light. Organisms that perform photosynthesis lives in this zone.
• When light enters the water, it is absorbed and reflected by the particles in the water. The deeper the water gets, the less light penetrates it.
  So, the correct option is B.