(a) Mention any four strategies adopted by flowering plants to prevent self- pollination.
(b) Why is geitonogamy also referred to as genetical autogamy?

Explanation

### Step-by-Step Solution:

#### (a) Four Strategies Adopted by Flowering Plants to Prevent Self-Pollination:

1. **Dichogamy**: This strategy involves the maturation of pollen and stigma at different times. When the male and female reproductive parts of a flower mature at different times, it reduces the chances of self-pollination. For example, if the stigma is receptive before the pollen is released, cross-pollination is encouraged.

2. **Hercogamy**: This strategy involves the presence of mechanical barriers on the stigma that prevent self-pollination. These barriers can be structural features that physically block pollen from the same flower or plant from reaching the stigma.

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