Seeds
Seeds
Seeds (/siːdz/) are the small, embryonic plants enclosed in a protective outer covering known as the seed coat. They are a vital part of the plant's reproductive system, allowing for the propagation of the species.
Etymology
The term "seed" originates from the Old English word "sæd", which has the same meaning. It is related to the Old High German "sāt", and the Gothic "sēþs".
Structure
Seeds are composed of three main parts: the embryo, the endosperm, and the seed coat. The embryo is the young plant itself, while the endosperm provides nourishment for the embryo. The seed coat protects the embryo and endosperm from environmental conditions.
Types of Seeds
There are two main types of seeds: monocotyledonous and dicotyledonous. Monocotyledonous seeds have one embryonic leaf, or cotyledon, while dicotyledonous seeds have two.
Seed Dispersal
Seeds are dispersed in a variety of ways, including by wind, water, animals, and even through explosive mechanisms. This process is known as seed dispersal.
Germination
Germination is the process by which a seed develops into a new plant. It begins when the seed absorbs water, causing it to swell and break open the seed coat. The embryonic plant then begins to grow, using the nutrients stored in the endosperm.
Related Terms
External links
- Medical encyclopedia article on Seeds
- Wikipedia's article - Seeds
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