Sexual Reproduction In Flowering Plants Question 5
Question: Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements, choose the correct answer from the options given below :
(1) A is false but R is true
(2) Both A and R are true and R is the correct explanation of A
(3) Both A and R are true but R is NOT the correct explanation of A
(4) A is true but R is false
Show Answer
Answer: (4) A is true but R is false
Explanation-
Assertion A is true because in gymnosperms, the pollen grains are indeed released from the microsporangium and carried by air currents.
Reason R is false because, in gymnosperms, the pollen grains are carried by air currents to the ovule, where they form a pollen tube to deliver the male gametes to the egg cell. The male gametes are not directly discharged at the mouth of the archegonia without the formation of a pollen tube.
BETA
