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nitrogen cycle
(Encyclopedia) CE5 Nitrogen cycle nitrogen cycle, the continuous flow of nitrogen through the biosphere by the processes of nitrogen fixation, ammonification (decay), nitrification, and denitrification. Nitrogen...lichen
(Encyclopedia)lichen līˈkən [key], usually slow-growing organism of simple structure, composed of fungi (see Fungi) and photosynthetic green algae or cyanobacteria living together in a symbiotic relationship and...moss, in botany
(Encyclopedia) CE5 Life cycle of a moss: A germinating spore forms a transitory branching structure on the soil surface, which develops into the conspicuous gametophyte, the familiar moss plant. Eggs and sperm ar...boa
(Encyclopedia)boa bōˈə [key], name for live-bearing constrictor snakes of the family Boidae, found mostly in the Americas. This family, which also comprises the egg-laying pythons of the Old World, includes the ...olive
(Encyclopedia)olive, common name for the Oleaceae, a family of trees and shrubs (including climbing forms) of warm temperate climates and of the Old World tropics, especially Asia and the East Indies. Many are popu...Greensburg
(Encyclopedia)Greensburg. 1 City (2020 pop. 14,976), seat of Westmoreland co., SW Pa.; settled c.1770, inc. as a city 1928. Located in a coal area, the city ...mamba
(Encyclopedia)mamba, name for African snakes of the genus Dendroaspis, in the cobra family. Widely distributed throughout Africa except in the deserts, mambas have extremely toxic venom. When attacking they raise t...Asimov, Isaac
(Encyclopedia)Asimov, Isaac ăzˈəmŏf [key], 1920–92, American author and scientist, b. Petrovichi, USSR, grad. Columbia (B.S., 1939; M.A., 1941; Ph.D., 1948). An astonishingly prolific author, he wrote over 40...manure
(Encyclopedia)manure, term used in the United States to refer to excreta of animals, with or without added bedding; also called barnyard manure. In other countries the term often refers to any material used to fert...mistletoe
(Encyclopedia)mistletoe, common name for the Loranthaceae, a family of chiefly tropical hemiparasitic herbs and shrubs with leathery evergreen leaves and waxy white berries. They have green leaves, but they manufac...Browse by Subject
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