海洋生物学 TPO19-L3 Salt Marshes

TPO19-L3

Salt marshes

Listen to part of a lecture in a marine biology class.

 


 

 

  1. What is the lecture mainly about?
  • A. The effect of the tidal flow on the salt marsh
  • B. Ways that some plants have adapted to living in salt marshes
  • C. The process of osmosis in plants
  • D. Differences between plants that grow in salt marshes and plants that grow elsewhere

 

  1. What is one result of reverse osmosis in the spartina?
  • A. Salt from seawater strengthens the plant’s cells.
  • B. All parts of the plant are able to receive oxygen.
  • C. Salt evaporates off the stems and leaves of the plant.
  • D. Water is unable to move across the plant cell walls.

 

  1. Why does the professor mention reddish mud on the roots of a spartina?
  • A. To illustrate the high density of salt-marsh soil
  • B. To explain how spartina rhizomes move through the soil
  • C. To point out the problems spartinas face in getting fresh water
  • D. To provide evidence that oxygen is present in the spartina’s roots

 

  1. In what way are rhizomes important for spartinas?
  • A. They allow plants to remain cool in direct sunlight.
  • B. They reduce the possibility of plants being uprooted during storms.
  • C. They help plants in dense soil process oxygen.
  • D. They reduce the concentration of salt in the surrounding seawater.

 

  1. What can be inferred about the process that prevents spartinas from breaking in violent storms?
  • A. It is the same process that helps them survive being immersed in saltwater.
  • B. The process is also responsible for causing their air tubes to form.
  • C. The process sometimes damages their rhizomes.
  • D. Many other plants have developed a similar process.

 

  1. Listen again to part of the Lecture. Then answer the question.


          Why does the professor say this: 🎧

  • A. To point out an incorrect conclusion
  • B. To clarify the meaning of a term
  • C. To admit that there is little evidence of the phenomenon she just described
  • D. To emphasize the difference between a fact and an opinion


答案:
B A D B A A

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