Evidences for Evolution

_____________________are similar structures which species have, but which perform different functions. They provide evidence of a common ancestor.

• DNA

• Vestigial structures

• Fossils

• Homologous structures

Recently, scientists have been able to use ___________to find common proteins and amino acids to determine how closely related species are.

• DNA

• Vestigial structures

• Fossils

• Homologous structures

_____________________are features present in modern organisms which are no longer in use.

• DNA

• Vestigial structures

• Fossils

• Homologous structures

Whales are aquatic mammals that contain a pelvis bone.  Even though it does not aid in its movement, the function must have been used by a common ancestor of the whale.  Thus, the pelvis is referred to as a(n)

• vestigial structure
• analogous structure
• homologous structure

A category of structures that have a similar function, but are structurally different. (No common ancestor)

• Homologous structures

• Analogous structures

• Vestigial structures

• Common core structures

The fossil record help scientists

• better understand the kinds of organisms that lived in the past

• better understand how the environment has changed over time

• better understand how organisms have evolved over time

• all of the above

What is the study of the similarities and differences in unborn fetuses, or developing organisms?

• Paleoclimatology

• Comparative embryology

Which of the following terms describes when a new species evolves or develops?

• Unifornitarianism

• Speciation

What are fossils?

• Are the remains or evidence of once-living organisms

• Is the change over time in populations of related organisms

• A chart that divides Earth’s history into different time units

• Occurs when the last individual organism of a species dies

By looking at the genes of some animals we can determine which living species are most closely related to each other. This also reveals which species most recently diverged from their common ancestor.

Based on the partial gene segments shown, which pair of animals are genetically most closely related and therefore most recently diverged from their common ancestor?

• Chimpanzee and Mouse

• Rat and Mouse

• Rat and Chimpanzee