Question

Ubisch bodies are present in
A)Pollen tube
B)Pollen gain
C)Microspore
D)Tapetum

Answer 1

Hint: The exine of the pollen grains in plants produces sporopollenin. With regards to its chemical composition, its importance is as follows: it is one of the most resistant organic compounds that can survive extreme temperatures, potent acids and alkali. There is no enzyme known to date that degrades sporopollenin.

Complete answer:
The tiny acellular structure of sporopollenin is the Ubisch shell. They are found in tapetum cells and help to grow pollen grains. They are lipid-like in nature. During spore wall development, they occur in the cytoplasm of the tapetal cells. Then, where they are released into the anther cavity, they migrate to the cell surface. Owing to the involvement of sporopollenin, ubic bodies are also involved in the external thickening of the exine.

1)Small acellular complexes of sporopollenin are pervasive bodies known as orbicules.
2)In the tapetal cells, it is present.
3)This is only the byproducts of the synthesis of sporopollenin pollen wall.
4)Ubisch bodies aid in the production of pollens.

Hence, the correct answer is option (D)

Note: The tapetum is a specialized nutritious cell layer of flowering plants found inside the anther, where it is situated between the sporangeal tissue and the wall of the anther. As well as a source of precursors for the pollen coat, Tapetum is important for the nutrition and growth of pollen grains.