Question

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

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

Coral reefs are formed by the accumulation of calcareous exoskeletons of coral animals, calcareous red algae and molluscs. In some species of red algae (coralline algae) cell wall become hardened with calcium carbonate. These are important for coral reef formation.