ледено доба

ледено доба

Interval of geologic time between 2 million and 10,000 years ago during which the northern hemisphere experienced several episodes of continental glacial advance and retreat along with a climatic cooling. The icing over of Antarctica was also completed during this time.

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Kép hozzáadása

Szófaj: noun
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Blossary:
Ipar/Tárgykör: Biológia
Kategória: Sejtbiológia
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Ледено доба

History; World history

Хладне фазе плеистоценске епохе, период екстремне осцилације у глобалној температури са одговарајућим ширењем и скупљањем поларних ледених покривача. Дуго прихваћени низ од четири ...

ледено

Oktatás; SAT vocabulary

Фригидно.

mezoderm

Biológia; Sejtbiológia

The middle layer of cells in embryonic development; gives rise to muscles, bones, and structures associated with reproduction. The middle embryonic tissue layer. Cells and ...

melanin

Biológia; Sejtbiológia

A pigment that gives the skin color and protects the underlying layers against damage by ultraviolet light; produced by melanocytes in the inner layer of the epidermis.

mejoza

Biológia; Sejtbiológia

Cell division in which the chromosomes replicate, followed by two nuclear divisions. Each of the resulting gametes (in animals, spores in plants) receives a haploid set of ...

megaspore

Biológia; Sejtbiológia

Four haploid cells produced by meiosis in the ovule of a þower. Usually, three of these cells degenerate, with the remaining cell becoming the female gametophyte phase of the ...

moždina

Biológia; Sejtbiológia

1. A term referring to the central portion of certain organs; e. G. , the medulla oblongata of the brain and the adrenal medulla, which synthesizes epinephrine and norepinephrine. ...

makroevolucija

Biológia; Sejtbiológia

The combination of events associated with the origin, diversification, extinction, and interactions of organisms which produced the species that currently inhabit the Earth. Large ...