生物学 TPO18-L4 North American Wood Frog

TPO18-L4

North American Wood Frog

Listen to part of a lecture in a biology class.

 



  1. What is the main purpose of the lecture?
  • A. To explain the biological advantages of a physical change that occurs in North American wood frogs.
  • B. To explain why the North American wood frog’s habitat range has expanded.
  • C. To describe the functioning of the circulatory system of the North American wood frog.
  • D. To introduce students to an unusual phenomenon affecting North American wood frogs.

 

  1. Why does the professor first mention the arrival of spring?
  • A. To encourage students to look for thawing wood frogs.
  • B. To point out the time period when frogs begin mating.
  • C. To explain why the class will soon be doing experiments with wood frogs.
  • D. To emphasize the speed of the thawing process.

 

  1. What happens to a wood frog as it begins to freeze?
  • A. Blood is concentrated in the center of its body.
  • B. Blood stops producing sugar.
  • C. Water moves out of its internal organs.
  • D. Water from just beneath the skin begins to evaporate.

 

  1. What are two points the professor makes about the thawing process of the wood frog?
    [CHOOSE 2 ANSWERS]
  • A. The thawing process is not fully understood.
  • B. The thawing process takes longer than the freezing process.
  • C. The frog’s internal organs thaw before its outer skin thaws.
  • D. Thawing occurs when the frog’s heart begins pumping glucose through its body.

 

  1. What impact does freezing have on some thawed wood frogs?
  • A. It increases their reproductive success.
  • B. It decreases their life span.
  • C. It causes them to be more vocal and active.
  • D. It reduces their ability to recognize potential mates.

 

  1. What does the professor imply when she says this: 🎧

 

  • A. She wants the student to clarify his question.
  • B. She wants the student to draw his own conclusions.
  • C. She thinks the student does not understand how car antifreeze works.
  • D. She thinks the student has misunderstood her point.


答案:
D A C AC D B

发表评论

电子邮件地址不会被公开。 必填项已用*标注