Evolution

Front

What kind of trait shows common ancestry with other organisms?

Back

Homologous trait

Front

If two organisms have a trait with the same purpose, but evolved them in different ways, what kind of trait is that?

Back

Analogous trait

Front

Which of these is an example of the bottleneck effect?

• Most of a group of tapirs is wiped out by a disease, leaving only a handful alive
• A small group of pigs are left on an island by humans, establishing a new population
• A population of field mice is entirely destroyed by predators

Back

Most of a group of tapirs is wiped out by a disease, leaving only a handful alive

Front

Which of these is an example of the founder effect?

• A group of starlings fly to a new island and are killed by local predators
• Only a few walruses were able to reproduce because their breeding grounds were destroyed
• A group of bison is isolated on an island after the ice they crossed on receded

Back

A group of bison is isolated on an island after the ice they crossed on receded

Front

What does a cladogram show?

Back

The relationships between different species

Front

Which of these two organisms have exactly three amino acids in their cytochrome C proteins? Options: E. africanus and E. ferus, A. forsteri and G. gallus, G. gallus and D. polylepis, D. polylepis and E. ferus

Back

A. forsteri and G. gallus

Front

Based on this chart of differences between the cytochrome C proteins of different organisms, which two organisms are most distantly related? Options: E. africanus and E. ferus, A. forsteri and G. gallus, G. gallus and D. polylepis, D. polylepis and E. ferus

Back

D. polylepis and E. ferus

Front

Which of these graphs represents stabilizing selection in a population?

Back

Front

Which of these graphs represents disruptive selection in a population?

Back

Front

What pattern of natural selection is affecting alligators whose snouts evolve to become shorter, allowing them to catch prey more quickly?

Back

Directional selection