海洋生物学 TPO10-L1 Whales

TPO10-L1

Whales

Listen to part of a lecture in a Marine Biology Class.

 



  1. What is the lecture mainly about?
  • A. Recent fossil evidence connecting whales and the hippopotamus.
  • B. Difficulties in the determining the evolutionary history of whales.
  • C. Similarities among ancient ancestors of whales.
  • D. Similarities between whales and other modern-day animals.

 

  1. According to the professor, what three aspects of the Ambulocetus fossil make Ambulocetus a likely bridge between land mammals and sea mammals?
    [CHOOSE 3 ANSWERS]
  • A. It had an elongated skeletal structure.
  • B. It strongly resembled a modern hippopotamus.
  • C. It had an unusually kind and thin tail for a whale.
  • D. It had limbs that could have been used for walking
  • E. Its skull had ear bones characteristic of land mammals

 

  1. According to the professor ,what does the discovery of Ambulocetus mean to researchers?
  • A. It fills a gap in the fossil evidence for whale evolution.
  • B. It has become less significant since the discovery of Basilosaurus.
  • C. It call into doubt the theory that whale evolved from land mammals.
  • D. It suggests that whales evolved more recently than was previously believed.

 

  1. What evidence suggests that whale are descendants of the hippopotamus?
  • A. Similarities between hippopotamus fossils and the Ambulocetus fossil.
  • B. Similarities in the genes of hippopotamuses and whales.
  • C. Similarities in the habitats of modern hippopotamuses and ancient whales.
  • D. Similarities in the skeletal structures of modern hippopotamuses and ancient whales.

 

  1. What is the professor’s opinion about recent genetic studies relating to whale evolution?
  • A. They solve a long-standing mystery involving fossil evidence.
  • B. They contain significant errors.
  • C. They present evidence that conflicts with fossil evidence.
  • D. The findings of the various studies should not have surprised researchers.

 

  1. What does DNA evidence indicate about relationships among whales?
  • A. All modern whales descend from sperm whales.
  • B. Differences among toothed whales are less significant that was previously thought.
  • C. Not all toothed whales are closely related.
  • D. Sperm whale are more closely related to killer whales than was previously thought.


答案:
C C AD D D B

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