Titlebook: Ecological and Evolutionary Genetics of Drosophila; J. S. F. Barker,William T. Starmer,Ross J. MacInty Book 1990 Springer Science+Business

hangdog

富饶

intolerance

, Drosophila mercatorum,he third problem is to relate the phenotypic variation to variation in life history. Natural selection requires fitness differences, and the potential for selection cannot be evaluated in a predictive fashion unless differences in life history attributes can be inferred. The fourth problem is to estimate the structure of the natural population.

semiskilled

Extreme Environmental Stress: Asymmetry, Metabolic Cost and Conservation,ncluding chloro-fluorocarbons (CFCs), all implying substantial exchange of materials between terrestrial systems and the atmosphere (Mooney ., 1987). The impact of CFCs is a likely depletion of stratospheric O. so diminishing its role as a protective absorber of short-wave radiation (Cicerone, 1987).

BALK