Question

Consider the following statements with respect to pollen grains.
(a) Exine is thin, continuous layer made up of cellulose and pectin
(b) Hard outer layer called exine is made of sporopollenin
(c) Sporopollenin is present in germ pores
(d) Exine exhibits a fascinating array of patterns and designs. Of the statements.

• A. a and b alone are correct
• B. a and c alone are correct
• C. b and d alone are correct
• D. b and c alone are correct

Answer 1

Answer: (C)

b and d alone are correct

•Exine is a thick layer made up of sporopollenin. The exine is discontinuous in some regions where sporopollenin is absent. These regions mark the germ pores. Hence statement (a) is incorrect.

•Hard outer layer of Exine is made up of sporopollenin which is one of the most resistant known biological material. Hence statement (b) is correct.

•Sporopollenin is absent at the site of germ pores. Hence statement (c) is incorrect.

•Exine shows different patterns or sculptures due to Tectum and Bacula layers. Hence statement (d) is correct.

Therefore, statements (b) and (d) are correct.

So, the correct answer is C.