NEETBotanySexual Reproduction in Flowering Plants
What is the characteristic of the mitotic divisions during the formation of the embryo sac?
Options
- ACell walls are formed immediately
- BNuclear divisions are followed immediately by cell wall formation
- CMitotic divisions are strictly free nuclear
- DCell walls are not formed at all
Correct answer
C. Mitotic divisions are strictly free nuclear
Step-by-step solution
Let us study about the formation of the embryo sac in detail. The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2- nucleate embryo sac. Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate stages of the embryo sac. It is of interest to note that these mitotic divisions are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation. After th