primarni

Stanice koje proizvodi apikalni meristem. Rast biljke koji nastaje proizvodnjom primarnog tkiva biljke u apikalnom meristemu na vrhovima izdanaka i korijena.

primarni proizvođač

Biologi; Ekologi

Organizam koji sam proizvodi svoju hranu fotosintezom (biljke) ili kemosintezom (neki mikroorganizmi). Primarni proizvođači čine temelj hranidbene mreže.

zimski solsticij

Astronomi; Mars

The position on the ecliptic occupied by the sun about december 22 when it reaches its greatest southerly declination.

proljetna ravnodnevica

Astronomi; Mars

The position on the celestial sphere occupied by the sun on or about march 21 when its path on the ecliptic crosses the celestial equator going from south to north. This point is ...

ultraljubičasto zračenje

Astronomi; Mars

The invisible electromagnetic radiation beyond the violet end of the spectrum of visible light, of wavelengths ranging, roughly, from 4000 down to 400 angstroms.

Mars

Astronomi; Mars

Mars is the fourth planet from the Sun. Mars' diameter is 6,790 km and takes 687 days to orbit the Sun. Mars is named after the Roman god of war. In Eastern Asian cultures Mars is ...

atmosfera

Astronomi; Mars

The gaseous envelope surrounding a celestial body.

astronomska jedinica (AJ)

Astronomi; Mars

A measure for distances within the solar system, equal to the mean ditance of the earth from the sun, which is about 93,000,000 miles.

Istilah-istilah dalam Berita

Istilah Terpilih

Armana

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pengikut

Industri / Domain: Literatur Kategori: Literatur secara umum

sumrak

The time between dawn and sunrise, and between sunset and dusk. Sunlight scattered in the upper atmosphere illuminates the lower atmosphere, and the ...