生物学 TPO32-L2 Relationships Among Species

TPO32-L2

Relationships Among Species

Listen to part of a lecture in a biology class.

 


 

 

  1. What is the lecture mainly about?
  • A. Ways species in an ecosystem affect each other’s population size
  • B. How the carrying capacity of an ecosystem is determined
  • C. A new theory regarding cycles in predator and prey population sizes
  • D. How researchers monitor the population size of animal species in the wild

 

  1. Why does the professor mention nonnative species?
  • A. To show that some species cannot be transplanted easily to new environments.
  • B. To give an example of rapid population growth that is not followed by decline.
  • C. To emphasize that species with rapidly growing populations harm ecosystem.
  • D. To introduce a study on the changing population size of certain species.

 

  1. What point does the professor make when she discusses the carrying capacity of an ecosystem?
  • A. The availability of food is more important for species than the availability of space.
  • B. The amount of environmental resistance in an ecosystem does not change over time.
  • C. Environmental resistance controls the population size of species in an ecosystem.
  • D. The population size of most species increases at a constant rate.

 

  1. How did the researchers test the links between acorns, white-footed mice, and gypsy moths in a forest?
  • A. They supplied an additional food source for gypsy moths.
  • B. They introduced gypsy moths to areas where there had been none.
  • C. They cleared oak trees from some areas where both animal species lived.
  • D. They manipulated the numbers of mice and acorns in some areas.

 

  1. What does the professor say can lead to a change in the gypsy moth population in a forest?
    [CHOOSE 2 ANSWERS]
  • A. An increase in the number of tree species in a forest.
  • B. An increase in the number of acorns produced by oak trees.
  • C. A decrease in the population of white-footed mice.
  • D. A decrease in oak tree leaves caused by gypsy moth caterpillars.

 

  1. What can be inferred about the professor when she says this: 🎧

 

  • A. She does not know the answer to the student’s question.
  • B. She wants to correct a statement she made earlier.
  • C. She thinks the term the student used is incorrect.
  • D. She would like to redirect the discussion.


答案:
B B C AD C D

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