Which one of the following completes the given statement correctly? A seed is a ripened _______

The correct answer is: D. Ovule

An ovule is the female reproductive structure in seed plants. It is a small, round organ that contains the female gamete, or egg cell. The ovule is enclosed in a protective layer called the integument, and it is attached to the placenta by a stalk called the funiculus.

When the ovule is fertilized by a sperm cell, it develops into a seed. The seed contains the embryo of a new plant, as well as a food supply that will help the embryo to grow.

The other options are incorrect because:

• An ovary is the female reproductive organ in flowering plants. It is a hollow structure that contains the ovules.
• A flower is the reproductive structure of flowering plants. It is made up of sepals, petals, stamens, and pistils.
• A gynoecium is the female reproductive part of a flower. It is made up of the pistils.

I hope this helps!