Question

In angiosperms, normally after fertilization

• A. The zygote divides earlier than the primary endosperm nucleus.
• B. The primary endosperm nucleus divides earlier than the zygote.
• C. Both the zygote and primary endosperm nuclei divide simultaneously.
• D. Both the zygote and primary endosperm nuclei undergo a resting period.

Answer 1

The correct option is B The primary endosperm nucleus divides earlier than the zygote.

• The endosperm is the nutritive tissue for the developing embryo and the seedlings.
• In angiosperm, the endosperm develops from triploid primary endosperm nucleus which is formed because of triple fusion, or fusion of a male gamete with the secondary nucleus of the central cell.
• Endosperm divides before the zygote because it will provide nourishment to the developing zygote.

So, the correct option is 'The primary endosperm nucleus divides earlier than the zygote'