Chromatin: The mixture of DNA and the structural proteins (histones) it wraps about in the mobile nucleus. Chromosomes are made from chromatin.
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Embayment: portions of open water or marsh defined by all-natural topographical characteristics like details or islands, or by human buildings for instance dikes or channels.
Continental Crust: the predominantly granitic rock that comprises the stony foundations on the continents. (Ocean flooring are composed mostly of basalt.) The crust's thickness varies from 20 to 75 kilometers. See Earth, Layers.
Dry Farming: irrigationless farming in arid or semi-arid ailments (rainfall below twenty inches a year).
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Mesocyclone: a spinning column of air inside of a thunderstorm by using a steep updraft. About fifty percent of mesocyclones spawn tornados.
Declination and Correct Ascension: declination, the angular length north or south through the celestial equator (the imaginary sky curve projected upward from your Earth's equator), brings together with right ascension (measurement alongside hour circles circling like meridians in between the celestial poles) to plot sky objects in the grid just like that of longitude and latitude.
Emissivity: the quantity of heat flowing from the Earth again into space. Emissivity and albedo help stability the global temperature.
Obliquity: the tilt in the Earth's axis (23.five° at present). The lean will make seasons attainable simply because at any given situation within the Earth's orbit within the Sun, 50 % with the planet will lean toward the Solar as the other 50 % leans from it.
Archaea: organisms that resemble microorganisms and also display traits found in multicellular organisms. They ended up uncovered in 1977 and have a tendency, like countless people of that era, to favor Severe environments.
Convergence: similarities that appear independently in multiple kind of organism. (Animals that reside in identical surroundings usually resemble one another, read more As an illustration.) Distinction with Homology.
Mitochondrion: an organelle (Even though outside the mobile nucleus) that electric power the mobile by changing organic and natural make a difference into ATP (energy)--see Carbohydrate Catabolism. Mitochondria also regulate bodily heat and refine the oxygen that might otherwise poison us. They look like upturned pillbugs.
Neoteny: retention of juvenile features within an Grownup, as while in the axolotl salamander in the vicinity of Mexico Metropolis; beneath specified environmental problems it under no circumstances fully matures. See Progenesis.