Question

Define pollination. Write the effect of rainfall on pollination.

Hint:

Pollination is essential for plant reproduction, but excessive rainfall can negatively impact the process by washing away pollen.

Answer 1

Definition of Pollination:
Pollination is the process by which pollen grains from the anther (male part) of a flower are transferred to the stigma (female part) of the same or another flower, leading to fertilization.
Types of Pollination:
1. Self-Pollination (Autogamy): The transfer of pollen within the same flower or plant.
2. Cross-Pollination (Allogamy): The transfer of pollen between different plants of the same species.
Effect of Rainfall on Pollination:
1. Positive Effects:
- Rain provides moisture for pollen tube formation, aiding fertilization.
- It helps in dispersing pollen for wind-pollinated plants.
2. Negative Effects:
- Heavy rain can wash away pollen before fertilization occurs.
- It can damage flowers, reducing the chances of successful pollination.
- Wet conditions make pollen grains sticky, hindering their movement.