Write the correct name of the following : A small pore in the ovule through which the pollen tube enters.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a small pore in the ovule where the pollen tube enters.

2. **Identifying the Structure**: In the ovule, there is a structure known as the integument, which is a protective covering. However, there is a specific area where this covering is absent.

3. **Locating the Pore**: The small pore in the ovule is located at the end of the ovule, which is where the pollen tube penetrates to fertilize the ovule.

...