Reproduction In Plants

Step 1: Role of tapetum in pollen development.
The tapetum is a layer of cells found in the anther of the flower. It provides nutrients and nourishment to the developing pollen grains.

Step 2: Conclusion.
Thus, the correct answer is option (3) Tapetum.

Step 1: Understanding Triple fusion.
Triple fusion is a process that occurs during fertilization in angiosperms (flowering plants). It involves the fusion of one male gamete (sperm) with two polar nuclei in the central cell of the embryo sac. This results in the formation of a triploid cell, which develops into the endosperm, providing nutrition to the developing embryo.

Step 2: Conclusion.
Triple fusion plays a crucial role in the formation of the endosperm, which is vital for seed development in plants.

Step 1: Understanding dormancy.
Dormancy is the state in which an embryo is temporarily inactive or not growing. In plants, seeds may remain dormant until environmental conditions are suitable for germination.

Step 2: Conclusion.
Thus, the correct answer is option (1) Dormancy.

• Microsporogenesis (formation of microspores)
• Megasporogenesis (formation of megaspores)