Question

Radicle emerges out of the seed earlier than plumule. What one advantage is served by this?

Answer 1

Hint Seed is a protective outer covering of an embryonic plant which includes the gymnosperm and angiosperm plants. They are the products of the ripened ovary after the process of fertilization by Pollen and grows in the mother plant.

Complete answer:
The radicle emerges out of the seed earlier than the plumule. The radicle absorbs the water and essential nutrients from the soil that help and boost the growth of the plumule and allow it to provide raw material to the process of photosynthesis. The radicle is the part of the seedling which is the growing part of the embryo to emerge from the sea during the process of germination. It is the embryonic root of the plant and grows in the downward direction in the soil. The seedling undergoes damping off when the radicle begins to decay. Plumule is a part of the seed embryo which grows into the shoot and bears the first true leaves of the plant. It is a small conical structure without any leaf in some seeds of flowers such as sunflowers. The cotyledon must have grown above the ground for the growth of plumule. They are bud-like and a small portion of the plant which gives rice to the true leaves is grown into the plant which gives rise to the several branches, leaves, seeds, and flowers.

Additional information:
Radicle is the embryonic root of the plant which grows downwards into the soil and is the first part of seedling which develops into the roots. It is whitish and is negatively phototropic. It shows positive geotropism and positive hydrotropism. It absorbs its water and minerals from the soil and rises from the process of seed germination. Plumule is the embryonic shoot of the plant which grows upwards into the air and develops into the shoot. It is less whitish and is positively phototropic. It shows negative geotropism and negative hydrotropism. It helps in the production of food by the process of photosynthesis in plants.

Note: The only crop production which increases the input in quantity is the seed. Different species of seeds have a different lifespan. Seeds are hygroscopic and are driven from the surface to the interior. The factors which influence the rate of deterioration of seeds are moisture content and temperature.