i. What is pollination? Give its two types.
ii. Draw a longitudinal section of female reproductive part of a flower showing germination of the pollen grain. The label on it the following:

(a) Stigma;

(b) Pollen tube with a male germ cell;

(c) Female germ cell.

Question

Philoid · Accepted Answer

(i) POLLINATION: Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma.

TYPES OF POLLINATION

Pollination is chiefly of two types:

• self-pollination

• cross-pollination

SELF POLLINATION: It is the transfer of pollen grains from the anther to the stigma of either the same flower or another flower of the same plant.

It is of two types-

Autogamy- when pollens are transferred from the anther to the stigma of the same flower.

Geitonogamy- when pollens are transferred from the anther to the stigma of another flower of the same plant.

CROSS-POLLINATION: It is the transfer of pollen grains from the anther to the stigma of a flower on the different plant.

It is sometimes also referred to as Xenogamy or Allogamy.

(ii) A diagram showing a longitudinal section of female reproductive part of a flower showing germination of the pollen grain is as follows:

i. What is pollination? Give its two types.ii. Draw a longitudinal section of female reproductive part of a flower showing germination of the pollen grain. The label on it the following:(a) Stigma;(b) Pollen tube with a male germ cell;(c) Female germ cell.