Molecular clock

Molecular clock

The theory that molecules evolve at an approximately constant rate. The difference between the form of a molecule in two species is then proportional to the time since the species diverged from a common ancestor, and molecules become of great value in the inference of phylogeny.

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Industry/Domain: Archaeology
Category: Evolution
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molecular clock

Archaeology; Evolution

The theory that molecules evolve at an approximately constant rate. The difference between the form of a molecule in two species is then proportional to the time since the species ...

molecular clock

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Archaeology; Human evolution

A means of determining dates of evolutionary divergences using genetic similarities between extant species and assuming that molecular evolution proceeds at a constant rate.

molecular clock hypothesis

Biology; Biochemistry; Molecular biology

The proposal, so far experimentally unverified, that mutations have occurred at random and at a constant frequency in all species throughout the billions of years of biochemical ...

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Internet; Internet communication

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Batesian mimicry

Archaeology; Evolution

A kind of mimicry in which one non-poisonous species (the Batesian mimic) mimics another poisonous species.

Müllerian mimicry

Archaeology; Evolution

A kind of mimicry in which two poisonous species evolve to look like one another.

Linnaean classification

Archaeology; Evolution

A hierarchical method of naming classificatory groups, invented by the 18th-century Swedish naturalist Carl von Linn? or Linnaeus. Each individual is assigned to a species, genus, ...

Ronald Nagel

Archaeology; Evolution

A hematologist and professor at Albert Einstein College of Medicine. His research includes molecular, biochemical, and physiological studies of genetic red blood cell defects, ...

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Archaeology; Evolution

A linguist who works on theoretical linguistics as it applies to signed and spoken languages. Among her research interests is a study of Nicaraguan Sign Language.

messenger RNA (mRNA)

Archaeology; Evolution

A kind of RNA produced by transcription from the DNA and which acts as the message that is decoded to form proteins.

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