Relatively easy to take.Unlike some, I find no problem with the idea of hybrids between ancestors of chimpanzees and humans ("Hybrid-Driven Evolution: Genomes show complexity of human-chimp split," SN: 5/20/06, p. 308). We have to assume that any speciation speciation Formation of new and distinct species, whereby a single evolutionary line splits into two or more genetically independent ones. One of the fundamental processes of evolution, speciation may occur in many ways. event will be protracted pro·tract tr.v. pro·tract·ed, pro·tract·ing, pro·tracts 1. To draw out or lengthen in time; prolong: disputants who needlessly protracted the negotiations. 2. . The collection of genes that separate humans from apes would hardly have arisen in a single individual. From my study of dabbling ducks dabbling duck Any of about 43 species (tribe Anatini; including 38 species in genus Anas) of ducks found worldwide, chiefly on inland waters and most commonly in temperate regions of the Northern Hemisphere. , I have come to believe that formation of hybrids is common during speciation events. TERRY TOOHILL, WHANGAREI, NEW ZEALAND New Zealand (zē`lənd), island country (2005 est. pop. 4,035,000), 104,454 sq mi (270,534 sq km), in the S Pacific Ocean, over 1,000 mi (1,600 km) SE of Australia. The capital is Wellington; the largest city and leading port is Auckland. |
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