Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Red algae contributes 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
Correct Answer: A
Solution :
Coral reefs are formed by the accumulation of calcareous exoskeksons 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.
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