Beak

... survived to reproduce which in turn shifted the population from mostly white to mostly black. With the finch example, those birds with smaller beaks survived to reproduce which in turn shifted the population to a ditribution of beak sizes which were smaller. Over many generations, this can ...

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... range for bristle hair number. This is a quanitative trait, determined by multiple genes. Another example which is from a natural situation is beak size in birds. In particular, Darwin's finches in the Galapagos islands. During a period of drought, small-seed plants began to dominate the flora ...

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... in the desert, and there are quite a lot of plant eaters there, so yes they need defenses against grazing. Bird do not have teeth, they have a beak and I wonder how you would compare teeth that would be located in the mouth and spikes located all over the plant. May I suggest limiting the consuption ...

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... MADE TIME AND TIME AGAIN see: EVOLUTION IS WRONG BECAUSE OF WOODPECKERS --WOODPECKERS DEFY EVOLUTION BECAUSE THE FIRST BIRD WOULD HAVE BROKE HIS BEAK TRYING TO PECK THROUGH THE HARD WOOD etc etc im not versed in this disinformation, but i've been alive long enough to hear the same tune sung in ...

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Say that all the big beaks live, and all the small beaks died out. You could only have variation now from the big beak birds which will evolve in a way that may bring variation, but the spectrum will now be limited. Variation now only ...

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