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14

Overview page. Subjects: Genetics and Genomics.

C a radioactive isotope of normal carbon (12C) emitting a weak beta particle. The half-life of 14C is 5,700 years. This radioisotope is extensively used as a tracer in molecular biology.

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a

Overview page. Subjects: Ecology and Conservation.

The usual abbreviation for year (from the Latin annus, meaning year).

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A

Overview page. Subjects: Genetics and Genomics.

1. mass number of an atom; 2. haploid set of autosomes; 3. ampere; 4. adenine or adenosine.

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A, B antigens

Overview page. Subjects: Genetics and Genomics.

Mucopolysaccharides responsible for the ABO blood group system. The A and B antigens reside on the surface of erythrocytes, and differ only in the sugar attached to the penultimate...

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AA-AMP

Overview page. Subjects: Genetics and Genomics.

Amino acid adenylate.

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Aapa mires

Overview page. Subjects: Plant Sciences and Forestry — Ecology and Conservation.

Fens, sometimes called ‘string bogs’, of circumpolar distribution, found in northern Scandinavia and boreal Canada. They are soligenous mires with ridges arranged roughly normal to the...

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aardvark

Overview page. Subjects: Zoology and Animal Sciences.

Few people have had the fortune of a close encounter with the aardvark, one of Africa's most bizarre and specialized mammals. Nocturnal and secretive, this ant and termite...

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abacá

Overview page. Subjects: Plant Sciences and Forestry.

(Manila hemp)

The strongest of the hard, natural fibres. It is extracted from the pseudostems of Musa textilis (see MUSA), a relative of the edible bananas. Grown mainly in the...

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abaptation

Overview page. Subjects: Ecology and Conservation — Zoology and Animal Sciences.

The process by which an organism is fitted to its environment as a consequence of the characters it inherits, which have been filtered by natural selection in previous environments. Because...

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abaxial

Overview page. Subjects: Ecology and Conservation — Plant Sciences and Forestry.

Of a plant organ, facing away from the axis or main stem (e.g. the lower surface of leaves). Compare adaxial.

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