Question

Which one of the following statements is not true ?
A. Pollen grains of many species cause severe allergies.
B. Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
C. Tapetum helps in the dehiscence of anther.
D. Exine of pollen grains is made up of sporopollenin.

Answer 1

Correct Answer - C
`**` In a transverse section a typical microsporangium appears near circular in outline. It is generally surrounded by four wall layers the epidermis, endothecium, middle layers and the tapetum.
`**` The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.
`**` The innermost wall layer is the tapetum.It nourishes the developing pollen grains. Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus (multinucleate or polyploid).