Exam 10: Evidence for Evolution

Continental drift is the ________ of Earth's landmasses through geologic time.

Bears have thinner bones than whales.Hippopotami have intermediate bone thickness.What hypothesis does this support?

Two different species may have similar features because of

Humans simulate the process of natural selection when they use ________ to develop new varieties of crop plants that better meet the needs of farmers.

Whale DNA is more similar to hippo DNA than to the DNA of any other mammal.This indicates that

What is biological evolution?

Equus (horses)have a single toe on their hoof,while Hyracotherium (the ancestor to horses)had four toes.Which of the following evidence would support this conclusion?

The fact that small,nonfunctioning hind legs are found in the skeletons of many snakes suggests that snakes

The following diagram shows the bone structure of a whale flipper and a bat wing.Which of the following suggests that these two structures are homologous rather than analogous?

Placing a human gene into a plant produces the same protein as would be produced in a human.Some of the genes in plants are similar to human genes;others are very different.What does this information indicate about the relationship between humans and plants?

Both humans and whales evolved from a common ancestor.Although our forelimbs are quite different,they are made of the same bones.This is an example of a(n)

Why do human embryos develop gill slits?

Match each example to the type of evidence supporting evolution. -Bats have the same forelimb bones as humans,but the size of these bones is different.

A group of scientists proposed that mammals with fur that contrasts with their background are hunted more by predators than mammals with fur that blends in with their background.After running several experiments,the scientists found that dark mice were attacked 25 percent of the time in a dark habitat and 75 percent of the time in a light habitat.The light colored mice were attacked 25 percent of the time in a light habitat and 75 percent of the time in a dark habitat.These data

Cultivation of corn over thousands of years has resulted in a modern corncob that looks very different from the tiny ancestral cob.Does this support the concept of evolution?

The study of organisms prior to birth or hatching is called ________.

Although they are protected in many countries,humans still hunt elephants for their ivory tusks.A mutation that results in tuskless elephants is increasing in frequency in some elephant populations.Is this an example of artificial or natural selection? Support your answer.

Evolution is

Dogs have vestigial digits called dewclaws.Describe the most likely origin of these structures.

Match each example to the type of evidence supporting evolution. -The human and chimpanzee insulin genes are 98 percent similar.