reloj

Un reloj altamente preciso que mide tiempo por medio de la frecuencia de la radiación electromagnética producida por un átomo individual de celsio 133.

reloj atómico

Telecommunications; GPS (global positioning system)

Un reloj muy preciso que opera utilizando los elementos cesio o rubidio. Un reloj de cesio tiene un error de un segundo por cada millón de años. Los satélites GPS contienen ...

vector de reloj

Software; Operating systems

A collection of clock vector elements that represents updates to a replica. Any change that occurs between 0 and the tick count is contained in the vector.

hongos

Archaeology; Evolution

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

Archaeology; Evolution

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

pirimidina

Archaeology; Evolution

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

ecosistema

Archaeology; Evolution

A community of organisms interacting with a particular environment.

célula fotorreceptora

Archaeology; Evolution

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

Archaeology; Evolution

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