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

A physical or behavioral trait that helps an organism survive and reproduce in its environment is called a what?

The pelvic bone of whales is not needed for movement within the water. This is an example of a(n) ______________ structure.

Many different groups of organisms have wings, even though they do not share a recent common ancestor. This is because they evolved in environments with similar selective pressures. Wings are an example of a(n) ______________ structure.

The Galapagos Islands, a small group of islands off the coast of Ecuador, is home to reptiles such as the giant tortoise and the iguana. The eastern islands are much older than the islands to the west. Which statement about the origin of these reptiles is best supported by this information?

The following information is false. Identify the statement from which the inaccuracy started.

All dog breeds are descended from wolves. (1) Given enough time and a bunch of wolves it is technically possible to create a Chihuahua. (2) By raising wolves in a warm environment they will not need heavy fur and providing them with plenty of food wolves will become less aggressive and develop smaller teeth. (3) The warm climate results in evolution by natural selection to favor the traits of Chihuahua

A way to estimate age in rocks or carbon by measuring the amount of radioactive decay in the sample.

Example: Uranium (U) turning

to lead (Pb) in rocks.

The idea that similar DNA or Amino Acid Sequences indicate common evolutionary ancestry

According to evolutionary theory, all living things have a common

Since their DNA is so similar, evolutionary theory implies that whales descended from land animals that were also the common ancestor to