Evolutionary BiologyFutuyma (ecology and evolution, SUNY Stony Brook) covers such subject areas as phylogeny, paleobiology, genetic mechanisms of change and speciation, character evolution, the theory of processes and macroevolution, and new molecular perspectives. Numerous line drawings, charts, diagrams, and maps are provided. Annotation copyrighted by Book News, Inc., Portland, OR |
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Pagina 169
If the constant a , called the allometric coefficient , equals 1 , then y ( say the
length of a limb ) is a constant proportion of x ( say body length ) . If y becomes
disproportionately greater as x increases , then a > 1 ; if lesser , then a < 1 (
Figure 3 ) .
If the constant a , called the allometric coefficient , equals 1 , then y ( say the
length of a limb ) is a constant proportion of x ( say body length ) . If y becomes
disproportionately greater as x increases , then a > 1 ; if lesser , then a < 1 (
Figure 3 ) .
Pagina 170
weight ) of the body increases roughly as the cube of body length x . Thus the
ratio of the organ ' s surface area to the volume of body it serves is constant only if
y = bx3 / 2 . Evolutionary changes in adult body size can occur for many adaptive
...
weight ) of the body increases roughly as the cube of body length x . Thus the
ratio of the organ ' s surface area to the volume of body it serves is constant only if
y = bx3 / 2 . Evolutionary changes in adult body size can occur for many adaptive
...
Pagina 370
But Bos and Scharloo ( 1973 ) found that after about 30 generations of selection
for body size in Drosophila , the variance did not change in either S or D lines .
Moreover mean body size declined in the S lines and increased in the D lines .
But Bos and Scharloo ( 1973 ) found that after about 30 generations of selection
for body size in Drosophila , the variance did not change in either S or D lines .
Moreover mean body size declined in the S lines and increased in the D lines .
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Sommario
Prelude to the Study of Evolution | 17 |
Heredity and Development | 33 |
The Ecological Context of Evolutionary Change | 51 |
Copyright | |
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adaptive advantageous alleles alterations ancestor appear arise associated average become behavior biological birds body bristle cause cent Chapter character characteristics chromosome common complex consists depends derived determined developmental differentiation direction Discuss distribution diversity dominant drift Drosophila ecological effect environment environmental enzyme equal equilibrium evidence evolution evolutionary evolved example exist extinction factors females Figure fitness fossil function gene flow gene frequency genetic genetic variation genotypes geographic greater growth heterozygotes higher highly human hybrid important increase individuals insects instances interactions isolated kinds less loci locus major males mating mean mechanisms mutation natural selection occur offspring organisms origin patterns phenotypic plants Pleistocene polymorphic population possible predators present probability produce proportion recombination relative reproduction response sexual similar single social speciation species structure suggests theory tion variance vary
Informazioni bibliografiche
| Titolo | Evolutionary Biology |
| Autore | Douglas J. Futuyma |
| Illustrato da | Sarah Landry |
| Edizione | illustrata |
| Editore | Oxford University Press, Incorporated, 1979 |
| Provenienza dell'originale | la University of Michigan |
| Digitalizzato | 23 feb 2010 |
| ISBN | 0878931996, 9780878931996 |
| Lunghezza | 565 pagine |
| Esporta citazione | BiBTeX EndNote RefMan |