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Evolution Part 1 Of 2
Test Description: Post-test Part 1
Instructions: Answer all questions to get your test result.
1) A population of green crickets lives in a lush, jungle habitat. A drought season causes the plants to dry up and turn brown. How might survival of the crickets be affected by this change?
A
Crickets with a mutation causing brown coloring might be more likely to survive.
B
Sexual selection would cause females to choose male crickets with large wings.
C
Crickets with no mutations would be more likely to survive.
D
No crickets would survive.
2) A virus kills 99 percent of the members of a single species in an isolated region. The few remaining individuals reproduce and begin to repopulate the region. This is an example of
A
speciation
B
sexual selection
C
the bottleneck effect
D
the founder effect
3) A new fossil is discovered and scientists conclude from comparative morphology that it is the forelimb of a vertebrate. What must the fossil look like?
A
It has three arm bones and at least five finger bones.
B
It has a single arm bone and five finger bones of equal length.
C
It has two equally-sized arm bones and at least three finger bones.
D
It has one straight bone with five curved bones coming off it.
4) When the allele frequencies of a population change because the size of the population has been reduced by disease or natural disaster, then ______________ has occurred.
A
Hardy-Weinberg equilibrium
B
the bottleneck effect
C
the founder effect
D
mutation
5) How many conditions must be met in order for the Hardy-Weinberg equilibrium to exist?
A
20
B
an infinite amount
C
1
D
5
6) Extreme phenotypes are favored in ____________ selection.
A
directional
B
sexual
C
disruptive
D
stabilizing
7) How might microevolution have occurred in a population of wading birds after only one very rainy season?
A
A new species of bird evolved that could hold its breath a longer time
B
Microevolution cannot happen that quickly.
C
The next generation had webbed feet unlike the parents.
D
The allele frequency for long legs increased.
8) Ancient organisms that lived during closer time periods were more alike than organisms that lived in widely separated time periods. What evidence in the fossil record most directly supports this scientific claim?
A
Most fossils are dated indirectly, by inference from surrounding rock that has been directly dated.
B
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
C
If the rock layers in a certain location have not been disturbed by tectonic or other movement, the lowest layer was formed b
D
The rocks that fossils are found in can be examined in in order to infer what environments certain organisms existed.
9) Stabilizing selection helps counteract the effects of
A
genetic drift
B
equilibrium
C
predation
D
extreme environmental changes
10) Fossils show that ancestors of the giraffe had shorter necks than the modern giraffe. The evolution of the modern giraffe may be an example of
A
disruptive selection
B
stabilizing selection
C
sexual selection
D
directional selection
11) Certain antibiotics become useless over time because
A
bacteria maintain stable allele frequencies
B
bacteria evolve resistance to the drugs
C
bacteria are artificially selected to resist drugs
D
antibiotics evolve to lose their potency
12) According to an evolutionary tree, which organisms share the most recent common ancestry?
A
the ones furthest apart
B
the ones that have at least two organisms between them
C
the ones that are next to each other
D
Organisms don't have common ancestors.
13) A population is
A
a group of organisms of several species in one area
B
a group of a single species in one area
C
two parent organisms and their offspring
D
all members of a species
14) Which of the following statements about Charles Darwin is true?
A
He explained the mechanism that drives evolution.
B
both A and B
C
He invented natural selection.
*select an answer for all questions
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