List the different types of pollination depending upon the source of pollen grain .

Explanation

To answer the question regarding the different types of pollination depending on the source of pollen grain, we can categorize them as follows:

### Step-by-Step Solution:

1. **Wind Pollination (Anemophily)**:
- In this type of pollination, pollen grains are transferred from the male part of the flower to the stigma of the female part through the wind.
- Characteristics:
- Pollen grains are usually light and sticky.
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