the finches originally came from south American main land
He thought they drifted over from the mainland.
the finches originally came from south American main land
The island of Cocos.
a common ancestor
That the finches were similar to the ones on the mainland, but had adapted to the island environment.
It is thought that the finches have a common ancestor. Separated on different islands, each island eventually produced different finches.
originated from a common ancestor
adaptive radiation
Geometric isolation of common ancestral species of finches has led to the development of 14 different species of finches in the Galapagos Island due to the concept of diversification.
he saw that in the different places and things the finches ate made their beak a different size and shape to adapt to their surroundings
Basically, the variation in beak size that indicated the birds radiating out from a common ancestor to finding many niches for food acquisition.
tu cola
Geographic isolation of a common ancestral species of finches
The finches were different species that shared a common ancestor
They had descended with modification from a common mainland ancestor.