Question

Sperm cells of angiosperms and gymnosperm differ from that of bryophytes and pteridophytes. Choose the statement that gives the incorrect difference.

• A. In angiosperms and gymnosperms, various biotic and abiotic pollinators are required for pollination, while bryophyte and pteridophyte require specifically water for transfer of male gamete to female gamete.
• B. In angiosperms the sperm cells are produced in the pollen grain whereas in the rest they are produced in the antheridium.
• C. In angiosperms and gymnosperms the sperm cells are non-motile whereas in the rest they are flagellated.
• D. In angiosperms and gymnosperms, pollen contains sporopollenin, while in bryophytes and pteridophytes, sporopollenin is absent.

Answer 1

The correct option is D In angiosperms and gymnosperms, pollen contains sporopollenin, while in bryophytes and pteridophytes, sporopollenin is absent.

Sporopollenin is a highly resistant and inert chemical that constitutes the outer wall of pollen grains of angiosperms. It protects the male gametes from high temperature, effects of acids and alkalis.
Sporopollenin has been shown to be present in some bryophytes, pteridophytes and gymnosperms as well.