Earth science

Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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turgor pressure

Plants; Flowers

Force exerted outward on a cell wall by the water contained in the cell. This force gives the plant rigidity, and may help to keep it erect.

vegetative growth

Plants; Flowers

Growth of a plant by division of cells, without sexual reproduction.

venation

Biology; Flowers

The arrangement and pattern of veins in a leaf.

whorl

Plants; Flowers

An arrangement of appendages, such as branches or leaves, such that all are equally spaced around the stem at the same point, much like the spokes of a wheel or the ribs of an ...