10. DNA sequences in many human genes are very similar to the sequences genes in
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10. DNA sequences in many human genes are very similar to the sequences genes in chimpanzees. The most likely explanation for of corresponding 10. A) chimpanzees evolved from humans. B) humans evolved from chimpanzees C) humans and chimpanzees are not closely related. D) convergent evolution led to the DNA similarities E) humans and chimpanzees share a relatively recent common ancestor this result is that 11. Charles Darwin believed that artificial selection was: A) similar in many ways to natural selection B) unimportant C) a common phenomenon in nature. D) impossible. Ej a process completely identical to natural selection. 12. 12. Within six months of effectively using methicillin to treat Saureus infections in a community, all new infections were caused by MRSA. How can this result best be explained? 1) Some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency B) S. aureus can resist vaccines. C) The drug caused the S. aurews DNA to change D) In response to the drug, S. aureus began making drug-resistant versions of the protein targeted by the drug E) A patient must have become infected with MRSA from another community. 13. 13. Natural selection is BEST described as: A) working on the existing variation of traits to favor those better suited to the organism's B) driving the species toward an eventual endpoint in which the species possesses the best possible adaptations for that particular environment. C) causing the death of a significant proportion of the population. D) the ability to generate new traits that better suit the species E) increasing the perfection of a species 14. Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection? 1. Well-adapted individuals leave more offspring than do poorly adapted individuals. 2. A change occurs in the environment. 3. Genetic frequencies within the population change. 4. Poorly adapted individuals have decreased survivorship. A) 4-1 23 B)241-3 C)2431 D)4-21-3 E) 4-2-3-1Explanation / Answer
A10) humans and chimpanzees share a relatively recent common ancestor.
A11) Similar in many ways to natural selection.
A12) In response to the drug S.aureus began making drug-resistant varsions of protein targeted by the drug.
A13)working on the existing variation of traits to favor those better suited to the organism’s environment.
A14) 2-4-1-3
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