Sexual Reproduction In Flowering Plant Question 32
Question: Read the assertion and reason carefully:
Assertion : Pollen grain reaches directly to the egg, which is seated deep in the ovarian cavity. Reason : To effect fertilization, the pollen grains germinate on the stigma.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If the assertion is false but reason is true
Show Answer
Answer:
Correct Answer: D
Solution:
In angiosperms the female gametophyte is seated deep in the ovarian cavity, quite away from the stigma.
The pollen (male gametophyte) are normally held at the stigma.
In seed plants the male gametes are brought to the egg containing female gametophyte by a pollen tube.
a pollen grain does not pass down the stigma.
Only its pollen tube does so.
BETA
