How is natural selection in the evolution of long necks in giraffes best explained?

Darwin noted many of the islands on the Galapagos Islands were-

Dinosaurs that lived on the Earth millions of years ago are no longer alive today. We call them-

Sometimes bones in the front limbs of animals have a similar structure. What do we call similar bone structures that indicate a link to a common ancestor?

Which would NOT likely be used as evidence of evolution?

When looking at two tree frogs of the same species, a slight difference was observed within members of the same species. This is called-

Two birds were originally of the same species. Over time, the two birds began to live in different environments and eat different foods. What were changes in beaks caused by?

What most likely happened to species that are found in the fossil record but have no living members?

The preserved remains or physical evidence of an organism that lived in the past are called-

A certain species of red fox will vomit before fleeing from a predator in order to move at a faster pace. This is a-

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