DNA Evidence of Evolution

Scientists compare organisms' DNA to support the theory that all species share a common _________________

• separation

• ancestor

• population

• environment

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NGSS.HS-LS4-1

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A scientist compares DNA taken from four different living species. Which of the following statements is true?

• Species X evolved from Species Y.

• Species A and Z share a recent common ancestor.

• Species A and Species Y are the same.

• Species Y and Species Z can interbreed.

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What conclusions can be made based on this table shown?

• the American black bear and the giant panda are most closely related

• the giant panda and the red panda are most closely related

• the red panda and the racoon are the most closely related

• the giant panda and the racoon are most closely related

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Two organisms that are closely related would have

• very similar DNA sequence

• exactly the same DNA sequences

• no proteins in common

• completely different DNA sequence

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If species A and B have very similar genes and proteins, what is probably TRUE?

• species A and B share a relatively recent common ancestor

• species A evolved independently of species B for a long period

• species A is younger than species B

• species A is older than species B

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NGSS.HS-LS4-1

Which of the following best describes the role of DNA in the evidence of evolution?

• DNA provides a record of evolutionary changes over time.

• DNA is identical in all living organisms.

• DNA does not change over generations.

• DNA is unrelated to evolutionary processes.

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NGSS.HS-LS3-1

What does the similarity in DNA sequences between two different species suggest?

• They have a common ancestor.

• They evolved in the same environment.

• They have identical physical characteristics.

• They are not related at all.

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How can DNA be used to determine evolutionary relationships?

• By comparing DNA sequences to find similarities and differences.

• By observing physical traits only.

• By analyzing the diet of organisms.

• By studying the habitat of organisms.

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Which type of DNA is often used to trace maternal lineage in evolutionary studies?

• Mitochondrial DNA

• Nuclear DNA

• Ribosomal DNA

• Chloroplast DNA

What is the significance of 'junk DNA' in evolutionary studies?

• It can provide insights into evolutionary history.

• It has no function and is ignored.

• It is responsible for coding proteins.

• It is only found in extinct species.

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