Question

The embryo sac of a typical dicot at the time of fertilization is

• A. 8 celled
• B. 7 celled
• C. 6 celled
• D. 5 celled

Answer 1

The correct option is B 7 celled

Embryo sac is a cell inside the ovule of a flowering plant where fertilisation occurs and which becomes the female gametophyte, containing the endosperm nucleus and the fertilised ovum that develops into the embryo. This embryo sac is a result of 7-cells and 8-nuclei. The seven cells comprise egg apparatus which consists of 1 egg cell and 2 synergid cells. Then there is 1 central cell with 2 nuclei and there are 3 antipodal cells.
Thus, the correct answer is option B.