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是这个题吗?呵呵 The primary purpose of the passage is to
A. present counterevidence to two hypotheses concerning the origins of bird flight B. propose and alternative to two hypotheses concerning the origins of bird flight correct certain misconceptions about hypotheses concerning the origins of bird flight C. (missing) D. refute a challenge to a hypothesis concerning the origins of bird flight E. evaluate competing hypotheses concerning the origins of bird flight
--------------------------------------------------- Q 4: The passage presents which of the following facts as evidence that tends to undermine the arboreal hypothesis?
A. Feathers tend to become larger over time B. Flapping flight is thought to have evolved gradually over time C. Many small animals are capable of climbing trees. D. Plants in Archaeopteryx’s known habitats were relatively small E. Leaping into the air does not provide as much acceleration as gliding out of a tree
------------------------------------------------ Q 5: Which of the following is included in the discussion of the cursorial hypothesis but not in the discussion of the arboreal hypothesis?
A. A discussion of some of the features of Archaeopteryx B. A description of the environment known to have been inhabited by bird ancestors C. A possible reason why bird ancestors might have been engaging in activities that eventually evolved into flight D. A description of the obvious features of animals with gliding ability E. An estimate of the amount of time it took for bird ancestors to evolve the kind of flapping flight that allowed them to become completely airborne
------------------------------------------------- Q 6: The passage suggests which of the following regarding the climbing ability of Archaeopteryx?
A. Its ability to climb trees was likely hindered by the presence of incipient feathers on its forelimbs. B. It was probably better at climbing trees than were its maniraptoran dinosaur cousins. C. It had certain physical adaptations that suggest it was skilled at climbing trees. D. Scientists have recently discovered fossil evidence suggesting it could not climb trees. E. Scientists are uncertain whether it was capable of climbing trees |