Question

Study the following statements and select the correct option.
A. Tapetum nourishes the developing pollen grains
B. Hilum represents the junction between ovule and funicle
C. In aquatic plants such as water hyacinth and water lily, pollination is by water.
D. The primary endosperm nucleus is triploid

• A. A and B are correct but C and D are incorrect
• B. A, B and D are correct but C is incorrect
• C. B, C and D are correct but A is incorrect
• D. A and D are correct but B and C are incorrect

Answer 1

The correct option is B A, B and D are correct but C is incorrect

Tapetum is the innermost layer of anther which possesses dense cytoplasm and are often multinucleated. The unusually large nuclear constitution and nutrient rich cytoplasm of the tapetum helps it in providing nutrients and regulatory molecules to the forming pollen grains. In a cross section of the megasporangium or an ovule, the stalk of the ovlue is called the funicle which is attached to the ovary wall and the region at which the funicle is attached to the ovule is called the hilum. In a majority of water plants like water hyacinth and water lily, flowers emerge above the water level and are pollinated by insects. The PEN (primary endosperm nucleus) is formed on fusion between haploid sperm and the diploid cental nucleus in the embryo sac thus the PEN is triploid.