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Certain antibiotics become useless over time because
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
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
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
Which of the following statements about Charles Darwin is true?
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
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?
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
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
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
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?
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
Extreme phenotypes are favored in ____________ selection.
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
A population is
the bottleneck effect
It has three arm bones and at least five finger bones.
bacteria evolve resistance to the drugs
Fossils found in adjacent rock layers are generally more like each other than fossils found in widely spaced layers.
He explained the mechanism that drives evolution.
sexual selection
a group of a single species in one area
disruptive
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