Question

Assertion (A): Fertilization in Cycas is called siphonogamy and zooidogamy.
Reason (R): Male gametes are multiciliate and carried by pollen tube.

• A. Both A and R are true and R is the correct explanation to A.
• B. Both A and R are true but R is not the correct explanation to A.
• C. A is true but R is false.
• D. A is false but R is true.

Hint:

Remember that Cycas is an exception among gymnosperms due to its motile male gametes.

Answer 1

The Correct Option is A

In Cycas, fertilization is called siphonogamy (involving pollen tube) and zooidogamy (involving motile male gametes). Male gametes are large, multiciliate, and are carried through the pollen tube toward the archegonium. Thus, both assertion and reason are correct, and R correctly explains A.