(Encyclopedia) Hereford cattleHereford cattlehûrˈfərd [key], breed of beef cattle originated in Herefordshire, England, and thought to be descended from the primitive cattle of the country. They are…
(Encyclopedia) Jennings, Herbert Spencer, 1868–1947, American zoologist, b. Tonica, Ill., B.S. Univ. of Michigan, 1893, Ph.D. Harvard, 1896. He was professor of zoology at Johns Hopkins (1906–10) and…
(Encyclopedia) Dorset, MarionDorset, Mariondôrˈsət [key], 1872–1935, American biochemist, b. Columbia, Tenn.; grad. Univ. of Tenn. (B.S., 1893) and Columbian (now George Washington) Univ. (M.D. 1896…
(Encyclopedia) Dunbar, William, 1749–1810, American scientist in the old Southwest, b. near Elgin, Scotland. He came to America in 1771. Commissioned by President Jefferson to investigate the…
(Encyclopedia) Muybridge, EadweardMuybridge, Eadweardĕdˈwərd mīˈbrĭj [key], 1830–1904, English-born photographer and student of animal locomotion. Muybridge changed his name from Edward James…
(Encyclopedia) rhythm, biological, or biorhythm, cyclic pattern of physiological changes or changes in activity in living organisms, most often synchronized with daily, monthly, or annual cyclical…
(Encyclopedia)
CE5
Fertilization of an egg cell
fertilization, in biology, process in the reproduction of both plants and animals, involving the union of two unlike sex cells (gametes), the sperm…
(Encyclopedia) vampire bat, name for the blood-drinking bats of the family Desmodontidae, found in the New World tropics. Vampire bats feed exclusively on the blood of living animals and are thus the…
(Encyclopedia) oxpecker, common name for an African starling of the genus Buphagus. Also known as tickbirds, oxpeckers have very short legs and sharp claws, which aid them in perching on the backs of…
(Encyclopedia) symbiosissymbiosissĭmbēōˈsĭs [key], the habitual living together of organisms of different species. The term is usually restricted to a dependent relationship that is beneficial to…
