Unit 7 Review

Evolution

Question #1

What is an organism said to be if it is able to survive and reproduce?

Fit

Question #2

What is an example of a mass extinction?

Ice age, meteor impact

Question #3

When two organisms live in the same area, but don’t breed because they have different mating seasons, what is this referred to?

Temporal isolation

Question #4

When two groups of organisms are not able to mate because they are separated by some geographical feature, what is this referred to?

Geographic isolation

Question #5

What phenomenon occurs when bacteria are exposed to antibiotics and the most resistant are able to survive?

Antibiotic resistance

Question #6

In a population, what are the fittest organisms always able to do?

Survive and have successful offspring

Question #7

If the largest organisms in a population were able to survive, what type of selection is this?

Directional selection

Question #8

If frogs of medium coloration are able to survive best, what type of selection is this?

Stabilizing selection

Question #9

What is regarded as our best evidence of how closely related two organisms are?

How similar their DNA is.

Question #10

When a mutation results in a beneficial trait, what will most likely happen to this gene in the population?

The gene will increase

Question #11

All organisms have which biochemical similarities that we use to compare organisms?

DNA

Question #12

Why can the forelimbs of mammals look so different if they all came from the same ancestral form?

Changes in genes allow organisms to be successful in different habitats/niches

Question #13

When two organisms don’t breed together because they do not recognize each other’s mating rituals, how do we refer to this?

Behavioral isolation

Question #14

How do we refer to the process by which humans produce specific varieties of plants, by only breeding the ones they want?

Selective breeding

Question #15

What is one method of absolute dating?

Radiometric (using radioactive isotopes)

Question #16

What is one method of relative dating?

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Stratigraphic dating (using the depth of rock layers)

Question #17

What process has led to the wings of a bird and a bat looking so similar?

Convergent evolution

Question #18

The fossils closest to the surface are how old compared to deeper fossils?

Deeper fossils are older than fossils near the surface.

Question #19

What process occurs as random changes in allele frequencies in the population?

Genetic drift

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Question #20

If all organisms have an equal chance to survive, can natural selection occur?

No

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