ZT-Manatee navigation

海洋生物学
Manatee navigation

1. What’s the main purpose of the lecture?

  • A. To explore a possible similarity between manatees and fish
  • B. To explore recent research on animal hair types and her functions
  • C. To show how marine mammals have adapted to various ocean environments 
  • D. To present a theory about the various functions of animals’ lateral lines 

2. What are three factors mentioned by the professor that affect manatees’ ability to navigate?
[CHOOSE 3 ANSWERS]

  • A. Their large body size
  • B. Their poor vision 
  • C. Their inability to echolocate
  • D. The rate of water flow in their habitat 
  • E. The level of visibility in their habitat 

3. How do tactile hairs differ from other hairs? 

  • A. They are softer to the touch.
  • B. They stimulate more nerves when they move. 
  • C. They can sense changes in temperature. 
  • D. They grow in straight-line patterns. 

4. What does the professor imply about manatees’ tactile hairs? 

  • A. They might serve the same function as a lateral line.
  • B. They probably evolve to help manatees hear better.
  • C. They are useful only during a limited period of a manatee’s life. 
  • D. They are located only on the manatees’ faces. 

5. What can be inferred about the recent research into manatees’ hair follicle sinuses?

  • A. The research explains why manatees can survive on land as well as under water
  • B. The research returned contradictory findings.
  • C. The research has led scientists to search for hair follicle sinuses on other marine mammals. 
  • D. The research confirmed what one scientist had already suspected 

6. According to the professor, what is a question that the researchers are investigating? 

  • A. How manatees’ navigational abilities compare to those of whales and dolphins 
  • B. How changes in water visibility can affect manatees’ ability to navigate
  • C. Whether manatees can detect motionless objects in water 
  • D. Whether manatees can remember specific routes to food source 

答案:
A BCE B A D C

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