The seed is an important part of a flowering plant. They give birth to a new plant. They should be of different shapes, colors and sizes.
They may have wings or round, Indian hair. Until they get enough sun, water and soil, they remain dormant. The growth of a plant from a seed is known as germination.
There are three parts:
- Seed Coat
- Endosperm
- Embryo
Seed Coat
The seed coat protects the inner parts of the seed. The seed coat consists of two layers. The outer layer is thick, known as the testa. The inner layer is thin and is known as the tegmen.
A thick seed coat protects the seed from sunlight and water. It also prevents water loss and parasite penetration inside the seeds. Hard seeds prevent germination in adverse environmental conditions.
The cavity in the spore is known as a microscope and is found in some seed pods. The hilum also appears to be equivalent to the navel in humans where the umbilical cord is located.
Endosperm
The endosperm contains stored nutrients. The seed provides nutrients in the form of starch, carbohydrates and proteins to support the embryo during germination. It is located under the seed coat. The seeds continue to survive until they germinate by consuming nutrients.
The endosperm can be flat, continuous or chewed. The endosperm has a triple chromosome.
In corn and other grains, the endosperm is an important part of the seed. In legumes and other seeds, the endosperm is used for embryonic development and is not present in the seeds. Coconut water is the endosperm.
Embryo
The ovary is the most important part of the sperm. It doubles and grows from a fertilized egg. All the cells needed to develop into an adult embryo are inside the ovary.
Types of Seeds
There are two types of seeds:
- Monocotyledonous seeds
- Dicotyledonous seeds
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