NEET BIOLOGY

Detailed explanation-1: -The coleoptile is a rigid piece of plant tissue that encloses the first few leaves (or plumule) of the corn seedling as the mesocotyl elongates and “pushes” the coleoptile to the soil surface during the emergence process.

Detailed explanation-2: -The radicle is the embryonic root of the plant, and grows downward in the soil (the shoot emerges from the plumule). Above the radicle is the embryonic stem or hypocotyl, supporting the cotyledon(s).

Detailed explanation-3: -Coleoptiles are cylindrical organs that ensheath the first leaf and shoot apex in grass seedlings. They help in the emergence of the first leaf (and shoot apex) by protecting it during its passage through the soil. On emergence, the first leaf breaks through the coleoptile tip.

Detailed explanation-4: -The radicle is the part of the seed that gives rise to the new plant. It is the first part of a seedling to emerge from the seed during the process of germination.