biology terms library

Biology terms are phrases commonly used in the study of living organisms. Understanding biology terms is vital to anyone interested in learning about or studying biology. Biology terms cover all biological fields, including genetics and conservation.

Featured Article: Mutation

Mutation, in a general sense, any change in the genetic makeup of an organism; such a change usually causes the organism to have a trait not possessed by any of its ancestors. See more »

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Microbiology

Microbiology, the branch of biology concerned with microorganisms including viruses, bacteria, protozoans, and certain algae and fungi.

Microorganism

Microorganism, or Microbe, an organism so small that it cannot be seen without the aid of a microscope.

Mutation

Mutation, in a general sense, any change in the genetic makeup of an organism; such a change usually causes the organism to have a trait not possessed by any of its ancestors.

Osmosis

Osmosis, the spontaneous flow of a liquid or gaseous substance through a semipermeable membrane.

Parasite

Parasite, an organism that lives in or on another organism, called the host, from which it obtains its food.

Photosynthesis

Photosynthesis, the conversion of light energy into chemical energy in cells that contain chlorophyll, a green pigment.

Protein

Protein, a large, complex organic molecule. Proteins are found in all living cells, making up about one-half of the dry weight of most organisms.

Spore

Spore, a tiny reproductive body that is typically unicellular. Spores are usually produced asexually.

Symbiosis

Symbiosis, a close association between two different organisms. Symbiosis is a Greek word that means “living together.” In one type of symbiosis, known as mutualism, both partners benefit from the association.