#Question id: 4616
#Unit 11. Evolution and Behavior
Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
#Question id: 4617
#Unit 11. Evolution and Behavior
Which of the following is not an observation or inference on which natural selection is based?
#Question id: 4618
#Unit 11. Evolution and Behavior
Which of the following observations helped Darwin shape his concept of descent with modification?
#Question id: 4619
#Unit 11. Evolution and Behavior
Within six months of effectively using methicillin to treat S. aureus infections in a community, all new S.aureus infections were caused by MRSA. How can this best be explained?
#Question id: 4620
#Unit 11. Evolution and Behavior
The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?
#Question id: 4621
#Unit 11. Evolution and Behavior
DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that