Question

seed ? D. LONG ANSWER TYPE 1. What are the functions of the following in a seed? (a) Seed coat (b) Micropyle (c) Cotyledons (d) Radicle (e) Plumule nroye that a suitab​

Answer 1

Answer:

1The seed coat's function is simultaneously to protect the embryo and to transmit information regarding the external environment. An impenetrable seed coat may help to keep the embryo safe, but at the same time it would exclude the sensing of environmental cues.

2 The micropyle helps in absorbing the water at the time of germination of the seed. It is through this micropyle the root emerges out at the time of germination of the seed.

3 Cotyledons help supply the nutrition a plant embryo needs to germinate and become established as a photosynthetic organism and may themselves be a source of nutritional reserves or may aid the embryo in metabolizing nutrition stored elsewhere in the seed.

4 The primary root, or radicle, is the first organ to appear when a seed germinates. It grows downward into the soil, anchoring the seedling. In gymnosperms and dicotyledons (angiosperms with two seed leaves), the radicle becomes a taproot.

5 Function of Plumule (shoot tip): The plumule is the part of the embryo that develops into the shoot bearing the leaves of the plant. The plumule gives rise to aerial shoots. The function of cotyledon: They store reserve food material or serve as photosynthetic organs in young seedlings.

Explanation:

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