Question

Find the odd one out

• A. Tapetum-nourishes the pollen grains
• B. germ pore-sporopollenin
• C. Intine-cellulose and pectin
• D. none of the above

Answer 1

The correct option is B germ pore-sporopollenin

The outer wall of pollen grain is called exine. It is made up of sporopollenin. The exine has apertures called germ pores. Sporopollenin is not present in germ pores. The pollen tube emerges through the germ pores as sporopollenin is absent.

Tapetum is the innermost layer of the wall of microsporangium and helps in the nourishment of pollen grains.

The inner wall of pollen grains called intine is made up of cellulose and pectin.