Investigating diversity Quiz
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5 questions, one answer each
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1. Two species have 2 amino acid differences in a protein; a third species has 15. Which statement is best?
- A. The third species is the most distantly related
- B. The first two species are different species with no ancestor in common
- C. The third species is the most closely related
- D. Amino acid sequences cannot show relationships
2. Why might two organisms have the same protein but different DNA?
- A. Mutations never affect DNA
- B. The genetic code is degenerate
- C. Proteins are not coded for by DNA
- D. mRNA is made of amino acids
3. Why is comparing DNA more reliable than comparing observable features for genetic diversity?
- A. Observable features are unaffected by the environment
- B. DNA sequences are affected by the environment
- C. DNA sequences directly show genetic differences
- D. DNA is easier to see
4. Sample X has a mean of 20 and standard deviation of 1; sample Y has a mean of 20 and standard deviation of 5. What is true?
- A. X has more variation
- B. Y has more variation
- C. They have the same variation
- D. Y has a lower mean
5. Why should samples be chosen at random when estimating variation?
- A. To avoid bias
- B. To increase the mean
- C. To reduce the standard deviation
- D. To make the sample smaller