Identify and name the two parts in a flower which are most important units of sexual reproduction?

3-Anther, 7-ovary

The correct answer is Option (3): 3-Anther, 7-ovary

Anther: The anther is part of the stamen (male reproductive organ) and is responsible for producing and releasing pollen grains, which contain the male gametes (sperm cells).

Ovary: The ovary is part of the pistil (female reproductive organ) and contains the ovules. The ovules develop into seeds after fertilization, and the ovary itself matures into a fruit.

These two structures are directly involved in the process of sexual reproduction in flowering plants. The anther produces the pollen that fertilizes the ovules within the ovary.

Other Parts:

• Style and Stigma: Part of the female reproductive system but not directly producing gametes.
• Filament: Part of the stamen that supports the anther.
• Thalamus: The base of the flower, supporting the floral organs.
• Sepals: Typically protective structures that enclose the flower bud.

Thus, the correct answer is: 3-Anther, 7-Ovary