The mechanism of Mediolateral intercalation in the formation of the primitive streak is mediated by the activation of the:

#Question id: 4653

#Unit 9. Evolution & Diversity of Life Forms

 If two modern organisms are distantly related in an evolutionary sense, then one should expect that

#Question id: 4654

#Unit 9. Evolution & Diversity of Life Forms

Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, these bones having developed from very similar embryonic tissues. How do biologists interpret these similarities?

#Question id: 4655

#Unit 9. Evolution & Diversity of Life Forms

Over evolutionary time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?

#Question id: 4656

#Unit 9. Evolution & Diversity of Life Forms

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

#Question id: 4657

#Unit 9. Evolution & Diversity of Life Forms

 Which of the following statements most detracts from the claim that the human appendix is a completely vestigial organ?

#Question id: 4658

#Unit 9. Evolution & Diversity of Life Forms

Members of two different species possess a similar-looking structure that they use in a similar fashion to perform the same function. Which information would best help distinguish between an explanation based on homology versus one based on convergent evolution?