OST Review Evolution

A common bone structure found in several organisms suggests that they _____________________________.

• live for a long time

• evolved slowly

• all grow at different rates

• share a common ancestor

Tags

NGSS.MS-LS4-2

This term describes a trait shared by organisms with a common ancestor that is similar in structure and function.

• a fossil

• sequential

• vestigial

• homologous

Tags

NGSS.MS-LS4-2

Structures found in organisms serving a similar function but not related by evolution are called ___________________ stuctures.

• vestigial

• homologous

• hybrid

• analogous

Which type of natural selection favors two extreme traits over the average trait?

• directional

• disruptive

• stabilizing

• none of the above

Over time, a species may change behavior or physical appearance in response to changes in the environment. This _____ helps organisms to survive better in the environment.

• resistance

• adaptation

• genetic variation

• genetic change

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

What process often begins when a portion of a population becomes physically or geographically separated and ends when the two populations cannot interbreed anymore?

• selective breeding

• speciation

• genetic change

• resistance

When allelic frequencies remain unchanged, a population is in genetic equilibrium. This statement expresses which of the following

• Natural Selection

• Artificial Selection

• Hardy-Weinberg Equilibrium

• Genetic drift

African cheetahs, which suffered a dramatic drop in population, rebounded in number to create a population of unusually similar genetic animals. This is called

• genetic drift

• founder effect

• bottleneck

• speciation

If a hypothetical colony of 100 humans isolated themselves on an island, their genetic make up after several generations would be determined by ____________

• speciation

• a bottleneck

• founder effect

• genetic drift

The theory that organisms best adapted to their environment are more likely to survive and reproduce.
"Survival of the fittest."

• Natural selection
• Adaptation
• Extinction
• Fossil

Tags

NGSS.MS-LS4-4