ID: A Name: The following pictures show a shark, which is a fish, and a dolphin,

Question

ID: A Name: The following pictures show a shark, which is a fish, and a dolphin, which is a mammal. The similar body types of these two specics are due to 47. a divergent evolution b. convergent evolution c. genetic drift. d. adaptive radiation 48. Vertebrates are a group of related animals with a backbone. All vertebrates have basically the same eye structure. Therefore, the vertebrate cyes are a homologous structures. b. vestigial structures c. analogous structures. d. convergent structures. 49. Vertebrates, animals with backbones, and arthropods, including insects, are only distantly related. The arthropod eye evolved independently of the vertebrate eye. Therefore, the arthropod eye and the vertcbrate cye arc structures in relation to each other c. analogous d. hybrid b. vestigial 50. Currently, the biggest factor having an effect on polar bear evolution is a convergent evolution b. polyploidy. rapid environmental changes. recent gcographic isolation. c. d. The only modern humans that exhibit Neanderthal genes are descended from noo-African ancestors. This is because a hybrids produced by interbreeding between Neanderthals and African bumans were not 51· fertile. b. the ancestors of African humans have the same ancestors as Neanderthals e. Neanderthals evolved outside of Africa, so only humans who lived outside of Africa could have interbred with them African humans evolved after Neanderthals went extinct. d. 52. Which of the following is NOT an example of a fossil a. the footprint of an ancient bumanlike being b. an insect preserved in hardened tree sap c. an imprint of feathers and a skeleton in a rock d. mammified remains of a saber-tooth tiger

Explanation / Answer

47. Convergent evolution

48. Homologous structure

49. Analogous

50. Rapid environmental changes

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