How many cells and nuclei are present in a typical angiosperm embryo sac?

8-nucleate 7-celled.

A typical angiosperm embryo sac at maturity is 7-celled and 8-nucleate.

The 7 cells are:

• Egg cell: This is the largest cell in the embryo sac, and it contains the female gamete.
• Synergids: These are two small cells that are located near the egg cell. They help to guide the sperm cells to the egg cell.
• Antipodal cells: These are three small cells that are located at the opposite end of the embryo sac from the egg cell.
• Central cell: This is the largest cell in the embryo sac, and it contains two polar nuclei. These polar nuclei can fuse with a sperm nucleus to form a triploid nucleus, which is the start of the endosperm.

The 8 nuclei are:

• 1 nucleus in the egg cell
• 2 nuclei in the synergids
• 3 nuclei in the antipodal cells
• 2 nuclei in the central cell