extinction process
61Habitat destruction — The Chaco thorn forest is being felled at a rate considered among the highest in the world to give way to soybean cultivation. Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species… …
62Effects of global warming — This article is about (primarily) effects during the 21st century. For longer term effects, see Long term effects of global warming. The variou …
63Dawkins vs. Gould —   First edition cover …
64plate tectonics — plate tectonic, adj. Geol. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past… …
65Operant conditioning — is a form of psychological learning during which an individual modifies the occurrence and form of its own behavior due to the association of the behavior with a stimulus. Operant conditioning is distinguished from classical conditioning (also… …
66History of evolutionary thought — This article is about the history of evolutionary thought in biology. For the history of evolutionary thought in the social sciences, see Sociocultural evolution. For the history of religious discussions, see History of the creation evolution… …
67Evolution of mammals — Restoration of Thrinaxodon, a member of the cynodont group, which includes the ancestors of mammals Further information: Evolutionary history of life The evolution of mammals within the synapsid lineage (sometimes called mammal like reptiles )… …
68Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
69Romance languages — romance1 (def. 8). [1770 80] * * * Group of related languages derived from Latin, with nearly 920 million native speakers. The major Romance languages French, Spanish, Portuguese, Italian, and Romanian are national languages. French is probably… …
70Biology (Philosophy of) in the nineteenth century — Philosophy of biology in the nineteenth century Jagdish Hattiangadi THE PHILOSOPHY OF BIOLOGY The emergence of biology as a unified subject Students of history and of biology share a common delight: as they study the details of any subject, they… …
