What is the term for the point where a seed is attached to the ovary wall?

The correct term for the point where a seed is attached to the ovary wall is known as the hilum. The hilum is a scar that marks the location where the ovule, before it became a seed, was connected to the ovary wall. This connection is crucial for the seed’s development, as it supplied nutrients during the seed's formation.

In contrast, the micropyle is a small opening in the seed that allows for the entry of the pollen tube, while the pollen tube is the structure that delivers sperm cells to the ovule for fertilization. A fruit is the mature ovary of a flowering plant, which typically serves to protect the seeds and aid in their dispersal, but does not refer to the specific attachment point of the seed. Understanding these differences is important for grasping plant reproductive structures and their functions.