Question

Assertion :Primary productivity is shown by green plants only. Reason: Primary productivity is also shown by chemosynthesizers.

• 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.

Green plants occupy the base of the trophic level and are known as producers. They trap the light from the sun and converts the photochemical energy into food and are considered as a major contributor to primary productivity.

Chemosynthesizers also contributes to primary productivity by converting carbon dioxide into organic food molecules. It regains its energy by oxidation of compounds containing sulfur, iron and nitrogen.

So, the correct answer is option B.