Exam 10: Evidence for Evolution

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

The fossils of organisms that existed when the continents were connected are distributed across ________ continents than the fossils of organisms that evolved after the continents separated.

Dolphin embryos develop hind limb buds, but these buds disappear after a short time. What is one mechanism to explain how this change occurs in the embryo?

Kangaroos are found only in Australia; these organisms

The preserved remains of formerly living organisms are called ________.

The proteins and DNA of organisms that share a recent common ancestor are ________ the proteins and DNA of organisms that do not share a recent common ancestor.

The genus Lycopodium includes plants that evolved before the breakup of Pangaea. The genus Sequoiadendron (Sequoia trees) evolved after Pangaea split into separate landmasses. Which genus would you expect to have the widest distribution of living representatives across the modern continents?

The fossil record

The increase in antibiotic resistance in E. coli as a result of treating healthy animals with antibiotics is an example of ________ driving evolution.

Whales and Indohyus share a more recent common ancestor than whales and fish. Which of the following is true?

Natural selection tends to

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

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

Dolphin embryos have both forelimbs, which will become the flippers, and hind limbs, which will not develop. Explain how this supports the conclusion that dolphins are related to humans.

Peppered moths are generally light in color and blend into the trunks of the trees they live on. Populations of peppered moths found in areas where soot has blackened the tree trunks are dark in color. This example demonstrates

Fossils of organisms that lived on Pangaea are likely found

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

Match each example to the type of evidence supporting evolution. -Dolphins develop hind limb buds, but these structures disappear before adulthood.

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