Darwin's studies of finches on the Galapagos Islands suggest that the differences in beak structure between the different species were most directly due to A.
Genetic variations for beak shape that became adaptations to different environments

B.
Mating behaviors of the different finch species

C.
The size of the island where the finches lived

D.
Acquired characteristics in the parent finches

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Which level of consumer had access to the smallest apply of energy

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c. ozone layer hole d. increase in sea levels