Question

Assertion :Red algae contribute in producing coral reefs.
Reason: Some red algae secrete and deposit calcium carbonate over their walls.

• 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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

In some species of red algae called coralline algae, the cell walls become hardened with calcium carbonate. These algae hence important for the formation of coral reefs. Coral reefs are formed through the accumulation

of calcareous exoskeletons of coral animals, calcareous red algae and molluscs. They form the foundation of reefs by secreting a calcium carbonate skeleton and provides protection for the coral polyps. Calcium

carbonate is secreted continuously by the coral colony.

So, the answer is A 'If both the assertion and the reason are true and the reason is a correct explanation of the assertion'