Question

Из чего состоит зародыш семени

Answer 1

Любой зародыш семени состоит из: зародышевого корешка, зародышевого стебелька, зародышевой почечки, одной или двух семядолей (зародышевых листьев).

Answer 2

Structure of a Seed Embryo

The embryo of a seed consists of several components that play crucial roles in the development of a new plant. These components include:

1. Embryonic Axis: - The embryonic axis consists of the radicle, hypocotyl, and epicotyl. - The radicle is the embryonic root, the hypocotyl is the region between the radicle and the cotyledons, and the epicotyl is the portion of the embryo above the cotyledons.

2. Cotyledons: - Cotyledons are the seed leaves of the embryo. - They serve as the primary source of nutrients for the developing plant until it can produce its own food through photosynthesis.

3. Seed Coat: - The seed coat, also known as the testa, is the protective outer covering of the seed. - It provides protection to the embryo and its food supply from mechanical injury, pathogens, and drying out.

4. Endosperm: - The endosperm is a tissue that provides nourishment to the developing embryo. - It is present in some seeds and serves as a food reserve for the growing plant.

5. Apical Meristem: - The apical meristem is a region of rapidly dividing cells at the tip of the shoot and root of the embryo. - It is responsible for the growth and development of the plant after germination.

6. Seed Germination: - The process of seed germination involves the reactivation of the embryo's metabolic processes, leading to the emergence of the embryonic axis and the development of the root and shoot systems.

In summary, the embryo of a seed consists of the embryonic axis, cotyledons, seed coat, endosperm (in some seeds), and apical meristem, all of which contribute to the development and growth of a new plant.

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