Question

Embryo sac of angiosperms contains.

• A. $3$- celled egg apparatus, $3$ antipodal cells and $2$ polar nuclei
• B. $2$- celled egg apparatus, $3$ antipodal cells and $2$ polar nuclei
• C. $3$- celled egg apparatus, $2$ antipodal cells and $1$ polar nucleus
• D. $3$- celled egg apparatus, $1$ antipodal cell and $2$ polar nuclei

Answer 1

The correct option is A $3$- celled egg apparatus, $3$ antipodal cells and $2$ polar nuclei

The embryo sac or female gametophyte of angiosperm contains 3 celled egg apparatus, 3 antipodal cells and two polar nuclei (secondary nucleus or central cell) at the centre of structure. A egg or oosphere in egg apparatus surrounded on either side by two synergids cells, develops into zygote after fertilisation while secondary nucleus or central cell (two polar nuclei) fuses to secondary male gametes, (carried out by pollen tube) and develops into triploid endosperm.

Hence the correct option is A.