A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant. The formation of the seed completes the process of reproduction in seed plants (started with the development of flowers and pollination), with the embryo developed from the zygote and the seed coat from the integuments of the ovule. All seeds are different size, shape and colour.
Seeds have been an important development in the reproduction and spread of flowering plants, relative to more primitive plants such as mosses, ferns and liverworts, which do not have seeds and use other means to propagate themselves. This can be seen by the success of seed plants (both gymnosperms and angiosperms) in dominating biological niches on land, from forests to grasslands both in hot and cold climates.
The term "seed" also has a general meaning that antedates the above — anything that can be sown, e.g. "seed" potatoes, "seeds" of corn or sunflower "seeds". In the case of sunflower and corn "seeds", what is sown is the seed enclosed in a shell or husk, whereas the potato is a tuber.
Read more about Seed: Seed Structure, Seed Production, Seed Functions, Seed Germination, Origin and Evolution, Seed Records
Famous quotes containing the word seed:
“We are all androgynous, not only because we are all born of a woman impregnated by the seed of a man but because each of us, helplessly and forever, contains the other—male in female, female in male, white in black and black in white. We are a part of each other. Many of my countrymen appear to find this fact exceedingly inconvenient and even unfair, and so, very often, do I. But none of us can do anything about it.”
—James Baldwin (1924–1987)
“We all know that the theater and every play that comes to Broadway have within themselves, like the human being, the seed of self-destruction and the certainty of death. The thing is to see how long the theater, the play, and the human being can last in spite of themselves.”
—James Thurber (1894–1961)
“The first month of his absence
I was numb and sick
And where he’d left his promise
Life did not turn or kick.
The seed, the seed of love was sick.”
—Alun Lewis (1915–1944)