Evolutionary BiologyCovers the genetic, developmental, and ecological mechanisms of evolutionary change, the major features of evolutionary history as revealed by phylogenetic and paleontological studies, and material on adaptation, molecular evolution, co-evolution, and human evolution. |
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Pagina 289
For example , among the archosaurian reptiles that included the crocodilians and
the dinosaurs , one lineage diverged dramatically and gave rise to birds ( Figure
3 ) . These are accorded their own class , Aves , because they are so different ...
For example , among the archosaurian reptiles that included the crocodilians and
the dinosaurs , one lineage diverged dramatically and gave rise to birds ( Figure
3 ) . These are accorded their own class , Aves , because they are so different ...
Pagina 299
To use an absurd example , birds appear earlier in the fossil record ( Jurassic )
than do snakes ( Cretaceous ) , but this does not mean that all the features of
birds are more primitive than those of snakes , nor that snakes are descended
from ...
To use an absurd example , birds appear earlier in the fossil record ( Jurassic )
than do snakes ( Cretaceous ) , but this does not mean that all the features of
birds are more primitive than those of snakes , nor that snakes are descended
from ...
Pagina 336
Archaeopteryx lithographica , from the mid - Jurassic , is the earliest known bird (
Figure 13 ) . Except for its feathers and a few osteological features , it has none of
the anatomical peculiarities that typify later birds . It shares numerous ...
Archaeopteryx lithographica , from the mid - Jurassic , is the earliest known bird (
Figure 13 ) . Except for its feathers and a few osteological features , it has none of
the anatomical peculiarities that typify later birds . It shares numerous ...
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Sommario
CONCEPTIONS AND MISCONCEPTIONS | 7 |
Chapter | 18 |
THE EFFECT OF DENSITY | 24 |
Copyright | |
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adaptive advantage allele frequency America animals appear arise average become behavior biological birds caused Chapter characteristics characters chromosomes common competition condition correlated depends derived determined differentiated direct distribution diversity Drosophila ecological effect environment enzyme equilibrium evidence evolution evolutionary evolved example exist extinction factors families favor females Figure fitness fossil function gene gene flow genetic drift genotypes geographic greater groups growth heterozygotes higher human hybrid important increase individual interactions isolation less linkage loci locus lower major males mammals mating mean mechanisms morphological mutation natural selection occur offspring organisms origin pairs pattern phenotype plants Pleistocene polymorphic population possible predators present probability recombination reduced region relative represent reproductive response sequence similar single sometimes speciation species structure taxa term theory tion trait usually variance variation vary