The fundamental problem in the origin of species is not the origin of differences in appearance, since these arise at the level of the geographical race, but the origin of genetic segregation. The test of species-formation is whether, when two… — David Lack Copy Share Image
On consideration, it is not surprising that Darwin's finches should recognize their own kind primarily by beak characters. The beak is the only prominent… — David Lack Copy Share Image
Rumour has it that the gardens of natural history museums are used for surreptitious burial of those intermediate forms between species which might disturb… — David Lack Copy Share Image
The fundamental problem in the origin of species is not the origin of differences in appearance, since these arise at the level of the… — David Lack Copy Share Image
