slepo crevo

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

생물; 세포생물학

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

생물; 세포생물학

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

생물; 세포생물학

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

생물; 세포생물학

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

생물; 세포생물학

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

뉴스 속의 용어

торнадо

1. A violently rotating column of air, in contact with the ground, either pendant from a cumuliform cloud or underneath a cumuliform cloud, and often ...