feto

feto

The embryo of a mammal that has reached a stage of development in the uterus in which most of the adult features are recognizable. Specifically in humans it refers to the stage of development after the appearance of bone cells, a process occurring 7 to 8 weeks after fertilization.

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Галузь/тема: Archaeology
Category: Evolution
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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.

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Галузь/тема: Aerospace Category: Space flight

transbordador espacial

Nave espacial reutilizable con alas desarrollado por la Administración Nacional de Aeronáutica y del Espacio de Estados Unidos (NASA) para misiones de ...