Galápagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are separated by about 100 km of ocean. Occasionally, individuals from either island fly to the other island to stay. This can alter the allele frequencies of the population through which of the following mechanisms?Question 4Select one:a.natural selectionb.genetic driftc.gene flowd.mutation

How did natural selection shape the evolution of finches on the Galápagos Islands?

Today, finches occupy every continent except Australia, most eating seeds, a diet for which their bills are well-adapted. Over the past several million years, 13 Galapagos finches have come to occupy the varied Galapagos islands. Finches found on these islands have very different bill shapes and feeding behaviors than finches found on the nearby mainland. Darwin gathered a considerable amount of field data on these finches and their habitats to propose his findings.What major factors allowed the birds to adapt to their new environment?Question 1Select one:A.genetic drift followed by mutationB.the founder effect followed by reproductive isolationC.mutation and disruptive selectionD.mutation followed by reproductive isolationE.mutation and increased reproductive fitness of some offspring

There are thirteen species of finches on the Galápagos Islands. These species must have originated from a few birds of the same species that made their way from South America over 500 miles of ocean.  This is an example of what?Group of answer choicesbiogeographyfossilsmutationnatural selection

Why did Darwin infer that finches on Galápagos islands had undergone evolution by natural selection?Multiple choice question.Because of the close correspondence between their beaks and their food.Because they all looked nearly identical.Because they were found on an island but not on the mainland.Because they had the same beaks regardless of their food source.

According to Darwin, the 14 species of finches on the Galapagos Islands resemble each other and the finches along the coast of the South American mainland due to which of the following?Multiple choice question.The finches all have a similar diet.The finches are descended from a relatively recent (several million years) common ancestor.The finches have independently evolved similar characteristics.The climate on the Galapagos Islands is similar to the climate on the South American mainland.