The seed with thick fibrous outer covering is:
Answer: B: Coconut
Explanation:
The seed with a thick fibrous outer covering is the coconut. Here is a detailed explanation:
1. Seed Structure: Seeds are the reproductive structures of plants that contain an embryo, stored food, and a protective outer covering.
2. Seed Coat: The outer covering of a seed is known as the seed coat or testa. It protects the embryo and the endosperm inside.
3. Coconut Seed: The coconut is a large seed with a thick fibrous outer covering, which is the husk or the mesocarp.
4. Husk: The husk of the coconut is made up of tough fibers that surround the inner shell. It is thick and fibrous, providing protection to the inner parts of the seed.
5. Endosperm: Inside the husk, there is a hard inner shell that encloses the endosperm. The endosperm is the nutritive tissue that provides nourishment to the developing embryo.
6. Embryo: The embryo is the developing plant inside the seed. It contains the embryonic shoot (plumule) and the embryonic root (radicle).
7. Coconut Uses: Coconuts are widely used for their water, meat, and oil. The thick fibrous husk also has various uses, such as making ropes, mats, and other natural products.
In conclusion, the coconut has a thick fibrous outer covering, which is the husk or mesocarp. This fibrous husk provides protection to the inner parts of the seed, including the endosperm and the developing embryo.