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General

General nature or nature terms.

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General

sedimentary rock

Biology; General

Any rock composed of sediment, i.e., solid particles and dissolved minerals. Examples include rocks that form from sand or mud in riverbeds or on the sea bottom.

stamens

Biology; General

The male reproductive structures of a flower; usually consist of slender, thread-like filaments topped by anthers. The male reproductive structures in the flower, composed of a filament and anther.

stapes

Biology; General

One of the three bones that function in hearing.

seed

Biology; General

Structure produced by some plants in which the next generation sporophyte is surrounded by gametophyte nutritive tissues. An immature sporophyte in an arrested state of development, surrounded by a ...

start codon

Biology; General

The codon (AUG) on a messenger RNA molecule where protein synthesis begins.

stem cells

Biology; General

Cells in bone marrow that produce lymphocytes by mitotic division.

seed coat

Biology; General

The tough outer layer of the seed, derived from the outer layers of the ovule.

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