1 A) A scientist in a laboratory develops a new species. B) Two different species develop in such a way that they look the same. C) A dog breeder makes a new breed of dog that looks different from all the others. D) A group becomes separated and they evolve until they cannot interbreed with the original population. 2 A) Cenozoic Era B) Cretaceous period C) Precambrian time D) Paleozoic Era 3 A) mammals B) dinosaurs C) reptiles D) trilobites 4 A) Insects that blend into trees survive because they are not seen, and thus not eaten, by birds. B) Native Americans do not kill an albino animal because it is thought to be bad luck. C) A breeder of cats specifically chooses cats to breed that have long, white fur. D) Giraffes that stretch their necks have necks that grow longer. 5 A) products of natural selection B) proof for evolution C) from different species D) from the same species 6 A) cold-blooded B) warm-blooded C) fast-moving D) nurturing their young 7 A) Vertebrates developed then. B) All organisms lived on land. C) Many of the organisms had soft bodies. D) There were no living things. 8 A) a mountain-building event B) a flood C) a comet hitting Earth D) an extinction 9 A) Paleozoic B) Precambrian C) Mesozoic D) Cenozoic 10 A) from the same species B) both mammals C) from different species D) extinct 11 A) trilobites B) jellyfish C) humans D) Tyrannosaurus rex 12 trilobite mean?A) three brains B) three legs C) three lobes D) three eyes 13 A) the original name for North America B) a large, single landmass C) a type of trilobite D) a geologic era 14 A) They developed the same way for all species. B) They all developed without eyes. C) They developed into many different forms over millions of years. D) They all had complex eye structures. 15 A) warm-blooded B) hair or fur C) cold-blooded D) produce milk to feed young 16 A) alien life-forms B) unique organisms that went extinct C) direct ancestors of Cambrian life-forms D) no one knows for sure 17 A) eons, epochs, eras, periods B) eons, eras, periods, epochs C) periods, epochs, eras, eons D) epochs, periods, eras, eons 18 A) from cyanobacteria B) from plants C) from animals D) from rocks 19 A) Volcanic eruptions can cause species to become extinct. B) The movement of plates forces some animals underground. C) Separating plates can divide groups of a population D) Radiation from plate tectonics can cause genetic change. 20 A) trilobites evolved B) vertebrates evolved C) there was life everywhere D) there was no life
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