convergencia

convergencia

The process by which a similar character evolves independently in two species. Also, a synonym for analogy; that is, an instance of a convergently evolved character, or a similar character in two species that was not present in their common ancestor. Examples include wings (convergent in birds, bats, and insects) and camera-type eyes (convergent in vertebrates and cephalopod mollusks).

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convergencia administrativa

농업; 농업 프로그램 & 법

USDA in 198 was developing a plan to consolidate the administrative function (e.g., accounting, budgeting, procurement, personnel) of its field service agencies at the state level ...

hongos

고고학; 진화

A group of organisms comprising the kingdom Fungi, which includes molds and mushrooms. They can exist either as single cells or make up a multicellular body called a mycelium. ...

ley

고고학; 진화

A description of how a natural phenomenon will occur under certain circumstances.

pirimidina

고고학; 진화

A kind of base. In DNA, cytosine (C) and thymine (T) are pyrimidines. In RNA, cytosine (C) and uracil (U) are pyrimidines.

ecosistema

고고학; 진화

A community of organisms interacting with a particular environment.

célula fotorreceptora

고고학; 진화

A cell, functionally part of the nervous system, that reacts to the presence of light. It usually contains a pigment that undergoes a chemical change when light is absorbed. This ...

mitocondria

고고학; 진화

A kind of organelle in eukaryotic cells. Mitochondria produce enzymes to convert food to energy. They contain DNA coding for some mitochondrial proteins.