Charles Darwin observed several species of finches on the Galápagos Islands, each with distinct beak shapes and sizes. These differences appeared to be adaptations to the specific types of food available on each island. For example, finches on islands with abundant hard seeds had stronger, thicker beaks, while those on islands with insects had thinner, sharper beaks.Which of the following observations by Darwin most directly led to his theory of natural selection?Question 2Answera.Variation in Traitsb.Adaptation to the Environmentc.Overproduction of Offspringd.Inheritance of Traits

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

How did natural selection shape the evolution of finches on the Galápagos Islands?Multiple choice question.Several different bird species migrated from the mainland to the Galápagos Islands and occupied the habitats to which they were best suited.Birds that used their beaks to crack bigger seeds acquired larger beaks in their lifetime and passed this trait on to their offspring.Birds with different heritable differences were able to better survive and reproduce in different habitats.

What did Darwin observe about the finches he collected from the Galápagos Islands?a. They all had identical beak shapesb. They were unrelated to each otherc. They evolved from South American speciesd. They had different beak shapes suited to their diet

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

What did Charles Darwin observe on the Galápagos Islands?Group of answer choicesthe fossil record of finches that once lived on different islandsdifferent rock layers on different islandsthe extinction of finches on different islandsphysical differences in finches that lived on different islands