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DIVERSITY John R. Platt I celebrate diversity. Our research, our lives, our goals, our pursuit of excellence are all too homogeneous. La Roche- foucauld writes: "God has put as many differing talents in man as trees in Nature: and each talent, like each tree, has its own special character and aspect. . . . The finest pear tree in the world cannot produce the most ordinary apple, and the most splendid talent cannot duplicate the effect of the homeliest skill." I think he means that other men are not like him in being able to make maxims of this kind. But what he

3 Diversity Consider a population of initially identical organisms. Suppose they are also reproducing asexually (although this is not critical). In the absence of constraints, natural selection, or any other force, mutation will cause individ- uals in the next generation to differ from each other. And in each subsequent generation, the expectation is that dif- ferences among individuals will increase. More precisely, at any given time, for any character with some measur- able dimension, a population of individuals will have some distribution in that

orders. Protocoleopteran elytra had distinct ribbing and sculpturing resembling that of species in the extant family Cupedidae, but were less regularly sculptured and extended beyond the abdomen. Modern Coleoptera replaced the protocoleopterans by the Late Triassic (240–220 million years ago), when all four of today’s beetle suborders were present. Based on fossil evidence from Europe and Central Asia, the evolutionary EVOLUTION & DIVERSITY below left Fossilized structures provide insights into the evolution of beetle lineages over time. This fossil of the

The Language of Race and the Limits of Racial Justice
And Other Dilemmas of Race, Admissions, and Meritocracy at Elite Universities
An Evolutionary Voyage of Discovery
Another Logic of Scientific Research

95 DIVERSITY For plants that are relatively rare, orchids are spectacularly diverse, with 25,000 wild species to their credit—twice as many as birds and four times as many as mammals. That diversity expresses itself in what Darwin called their “beautiful contrivances,” the mesmerizing colors and sensual shapes that make orchids irresistible. chapter 2 Bulbophyllum lobbii. Poring Hot Springs, Sabah, Borneo 97 The species richness of the orchid family is staggering and unprecedented in the plant world—an estimated 25,000 known species in 725 genera. And

Range and Diversity Free Improvisation Free improvisors are by nature migratory crea- tures. They range far and wide, and are common from the United States and Canada to Europe and Asia, with communities in Australia, and occa- sional sightings in Africa and South America. First identified in the United States and several northern European countries (England, Holland, Germany), free improvisors once roosted locally, but they have now established themselves far from their home berths. Joe McPhee, for instance, who was at one time hyper- local— performing

- Diversity and Immigration Edward F? Lazear A growing number of studies are attempting to document the effect of immigration on wages of native-born Americans.’ The emphasis has been on a corollary of standard trade theory. The idea is that the immigrant is paid his marginal product. The inframarginal returns are captured by the complementary factors of production, in this case, natives, who own the capital and complementary labor. The focus on wage effects of immigra- tion is a natural consequence. Most proponents of immigration, however, argue for