A Researcher Was Studying Mutations In Bacteria

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A researcher was studying mutations in bacteria. He found that certain bacteria had changes in their DNA that allowed them to be resistant to antibiotics. This research is an example of___________. The mutation will lead to

Answer: 1.evolutionary genetics.

2.all the bacteria becoming resistant to the specific antibiotics

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The DNA of humans and mice is almost 92% similar. This similarity indicates that ________. mice and humans have different ancestors. Mice have a tail, while humans have a tailbone. The tailbone is a _______structure in humans

Answer: 1.mice share a common ancestor with humans

2.vestigal

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The phylogeny chart shows the evolution of camels. Camelus is the modern-day camel. Based on this chart, which three statements are true?

Answer: 1.Modern camels are more related to Camelops than to Aepycamelus.

2.Pliauchenia and Oxydactylus may share similar features.

3.Procamelus and Stenomylous may share similar features.

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Looking at the phylogenetic tree, which three statements can you make about the interconnectedness of the species A, B, C, D, and E?

Answer: 1.Species A and C may have shared features from a common ancestor.

2.Species B and E may have shared features from a common ancestor.

3.Species A is more related to species B than species B is related to species C.

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Which three of the following are examples of adaptations for an animal that lives in a snowbound region?

Answer: 1.dense hair all over the body to protect from cold

2.a thick layer of fat to insulate the body

3.padded feet to walk through snow

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In a garden with trees and shrubs, green and pink katydids were observed. Over time, birds started feeding on the katydids. Which two statements describe what will eventually happen to the population of the katydids?

Answer: The population of pink katydids will decrease.

The population of green katydids will increase.

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Classify the structures as homologous or analogous, depending on their structure and function.

Answer: Analogous:

1.The wings of a bird have a skeletal structure, but the wings of bees do not.

2.The limbs of a bat andthe forelimbs of a birdhave similar functionsbut different anatomy.

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Classify the structures as homologous or analogous, depending on their structure and function.

Answer: Homologous:

1.The arm of a human and the arm of a chimpanzee have similar functions and bone structures.

2.Frogs and salamandersare both amphibians,and they also both havethree-chambered hearts.

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An organism was hunted almost to extinction, but the population bounced back. Which evolutionary change did this species most likely experience?

Answer: bottleneck effect

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Which scenario is an example of a functional adaptation?

Answer: Poison dart frogs produce a toxic venom that they can secrete out of their skin.