Question

Arrange the sentences given below in order to describe the process of fertilisation. Which of the following gives the correct order?
P) The pollen tube reaches the ovary.
Q) The pollen tube grows out from the pollen.
R) The male gamete moves into the ovule to fuse with the ovum.
S) The pollen tube grows down through the style.

• A. P, Q, R, S
• B. Q, S, P, R
• C. R, Q, S, P
• D. P, S, Q, R

Answer 1

The correct option is B Q, S, P, R

Fertilisation takes place by the fusion of male and female gametes. the sequential steps of the fertilisation are as follows:

a) The pollen tube grows out from the pollen.

b) The pollen tube grows down through the style

c) The pollen tube reaches the ovary.

d) The male gamete moves into the ovule to fuse with the ovum.

So, the correct answer is option B.