Question

Free nuclear division occurs in.
a) Flower
b) Gametes
c) Endosperm
d) Fruit

Answer 1

Hint: Nuclear division is the division of nucleus that takes place during mitotic and meiotic cell division.

Complete answer:
To understand the free nuclear division occurring region, we should first understand the meaning of free nuclear division. The free nuclear division is the division of Karyokinesis that means mitotic cell division and the division of cytoplasm does not occur. It is produced as a multinucleated condition that is termed as syncytium. It occurs in the endosperm of coconut. The endosperm is of three types; cellular, nuclear, and helobial endosperm. Among these the nuclear and helobial undergoes free nuclear division.

Now lets us find the solution from the given options:
1) Flower is the part of plants that is a reproductive organ. They carry pollen grains that formed due to the meiotic cell division of cells that means it undergoes cytoplasmic division; therefore they are not undergoing free nuclear division.
2) Now, gametes are the unit that carry the genetic materials they undergo both mitotic and meiotic cell division, therefore, they do not undergo free nuclear division.
3) Next is the endosperm, they are of three types’ nuclear, cellular, and helobial. The nuclear and the helobial undergo repeated free nuclear division to form the cell wall.

Thus, the right answer is option C. i.e., Endosperm.

Note: The free nuclear division involved in the enlargement of cells, the megaspore cells undergoes mitotic division and produces two nucleate embryo sacs. The two nuclei move to the ends and divide again to form four nuclear and then eight nucleate structures.