Porogamy.

Explanation

### Step-by-Step Solution for Porogamy

1. **Definition of Porogamy**:
- Porogamy is a type of fertilization process in seed plants. It specifically refers to the entry of the pollen tube into the ovule.

2. **Fertilization Process**:
- In seed plants, fertilization occurs when the pollen from the male part of the flower reaches the ovule in the female part. This is facilitated by the growth of a pollen tube.

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