Question

A typical embryo sac is $8-$nucleate and:

• A. Eight celled
• B. Four celled
• C. single celled
• D. seven celled

Answer 1

The correct option is D seven celled

In angiosperms, the embryo sac acts as the female gametophyte as it carries the female gamete within itself. It develops due to mitotic divisions of the haploid functional megaspore cell within the megasporangium or ovule.

A typical mature female gametophyte or embryo sac of a flowering plant at the time of fertilisation is composed of $7$ cells and $8$ nuclei.

It consists of the following:

• An egg apparatus with one haploid egg cell and two haploid synergids.
• Three haploid antipodal cells.
• A central cell with two haploid polar nuclei fused together as a diploid secondary nucleus.