生物学 TPO21-L3 Colubrid

TPO21-L3

Colubrid



 

  1. What is the lecture mainly about?
  • A. Methods of analyzing toxic proteins in snake venom
  • B. Insights about snake evolution provided by venom analysis
  • C. How snake venom differs from lizard venom
  • D. Why colubrids are considered nonvenomous snakes

 

  1. Why does the professor review information about the classification of snakes that students probably learned in previous courses?
  • A. To determine whether the students have enrolled in the appropriate course
  • B. To stress the usefulness of the classification system for students
  • C. To present assumptions that have recently been challenged
  • D. To give an example of a method that she will explain in greater detail

 

  1. According to the professor, what is a major weakness of the classification system that is based on animals’ physical characteristics?
  • A. It can show the relationships only among a small number of animal species.
  • B. It requires technology that is not widely available.
  • C. It cannot account for characteristics that first appeared in the recent geologic past.
  • D. It cannot determine whether similar characteristics developed in similar ways.

 

  1. According to the professor, in what way do colubrid snakes differ from other venomous snakes?
  • A. Colubrids did not evolve from lizards.
  • B. Colubrids do not use venom to catch their prey.
  • C. The front teeth of colubrids are much larger than those of other venomous snakes.
  • D. Colubrids produce a much stronger type of venom than other venomous snakes do.

 

  1. Why does the professor mention the brown tree snake?
  • A. To support a hypothesis about the evolution of constrictor snakes
  • B. To support a hypothesis that venomous snakes evolved from constrictor snakes
  • C. To give an example of a snake species that was never venomous
  • D. To give an example of a type of snake that can change its color

 

  1. What is the professor’s attitude toward the results from medical research on snake venom proteins?
  • A. She is enthusiastic about the drugs that have been tested to date.
  • B. She is concerned about the side effects of drugs created from snake venom proteins.
  • C. She doubts that the DNA database will be useful in developing new drugs.
  • D. She thinks it is too early to tell how successful the research will be.


答案:
B C D B A D

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