Biology

Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Ecology

pyramid of energy flow

Biology; Ecology

A diagram showing the flow of energy through the trophic levels of a food chain or web. About 10% of the usable energy at one trophic level makes it to the next. Many small ...

biome

Biology; Ecology

The largest ecological regions distinguishable by characteristic plants and animals. There are six: tundra, conifer, deciduous forest, grassland, tropical, and desert. Biomes are ...

obliquity

Biology; Ecology

The tilt of the Earth's axis (23. 5° at present). The tilt makes seasons possible because at any given position in the Earth's orbit around the Sun, half of the planet will lean ...

cover crop

Biology; Ecology

A crop grown to protect the soil from erosion and nearby food crops from weeds. Can be dug under to put nutrients back into the ground. Common cover crops include buckwheat, hairy ...

neap tide

Biology; Ecology

One that arrives when the moon is in its first or last quarter. Because the sun and moon stand at right angles to each other, their tidal pulls partially nullify each other, ...

gleization

Biology; Ecology

When slowed decomposition in a waterlogged environment allows layers of vegetation to accumulate. Peat is a frequent result. In Russia gleization has been used to grow an organic ...

limestone

Biology; Ecology

Sedimentary rock composed of calcium carbonate (calcium carbonate) formed by deposits of seashells and marine animal skeletons. Limestone is often added to cement and other ...