#Question id: 4650
#Zoology
DDT was once considered a ʺsilver bulletʺ that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run?
#Question id: 4653
#Zoology
If two modern organisms are distantly related in an evolutionary sense, then one should expect that
#Question id: 4654
#Zoology
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
#Zoology
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
#Zoology
Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
#Question id: 4657
#Zoology
Which of the following statements most detracts from the claim that the human appendix is a completely vestigial organ?