NEET BIOLOGY

Detailed explanation-1: -Endothecium helps in dehiscence. Note: Endothecium is the layer that secretes materials that are essential for the proper maturation of the pollen grain.

Detailed explanation-2: -Assertion: The innermost layer of microsporangium is called tapetum. Reason: Tapetum performs the function of protection and help in dehiscence of anther to release pollen grains.

Detailed explanation-3: -Assertion: Endothecium layer of anther wall plays an important role in dehiscence of anther. Reason: The presence of fibrous bands and differential expansion of inner and outer tangential walls of endothecial cells cause dehiscence of anther.

Detailed explanation-4: -The endothecium and the localized secondary thickening within this cell layer also play a critical role in anther opening and pollen release. Endothecium development is coordinated with pollen maturation and the degeneration of the anther tapetum and middle layer.

Detailed explanation-5: -Role of endothecium : Microsporangium generally surrounded by wall layers like epidermis endothecium 2 or 3 middle layers and the tapetum. Endothecium performs the function of protection and helps in dehiscence of another to release the pollen.