Question

Assertion (A): Diatoms do not decay as early as other algae​

Reason (R): Diatoms have siliceous cell walls​

Directions: Choose the correct option:​

Answer 1

Correct answer: (a) Both assertion(A) and reason(R) are true, and reason(R) is the correct explanation for assertion(A). ​

• ​Diatoms may be either unicellular or colonial. ​

• They have silicified cell walls hence they do not decay easily. ​

• Hence, the correct option is (a).​