生物学
Climate effects
1. What is the lecture mainly about?
- A. Similarities and differences between polar and tropical birds
- B. How mammals tend to differ from birds in choosing a microhabitat
- C. How feeding strategies based on climate can influence species diversity
- D. Warning signs that indicate when a species is threatened with extinction
2. What are two points the professor makes about polar animals species with regard to the food they eat?
[CHOOSE 2 ANSWERS]
- A. They change their eating behaviors based on food availability
- B. They can survive without food for long periods of time
- C. They tend to need more food in the winter than in the summer
- D. They look for food over a very wide area
3. Why does the professor discuss the arctic fox?
[CHOOSE 2 ANSWERS]
- A. To point out its effect on bird populations in polar regions
- B. To identify an animals species affected by seasonal change
- C. To illustrate the importance of microhabitats
- D. To give an example of a generalist species
4. What reason does the professor give to support the claim that microhabitats lead to an increase in species diversity?
- A. They have temperatures that are suitable for many species.
- B. They reduce competition among species for the same food resources.
- C. They allow individual species to spread throughout multiple ecosystems.
- D. They prevent animals species destroying their food sources through overpopulation
5. Why does the professor mention species extinction?
- A. To emphasize a possible consequence of specialization
- B. To point out the effect of human activity on polar habitats
- C. To illustrate a downside of competition between different species
- D. To give a reason why animal species might change its microhabitats
6. What does the professor imply when she says this: 🎧
- A. The student has guessed correctly
- B. The student’s explanation is surprisingly original
- C. The student has not understood her question
- D. The student’s conclusion is logical but inaccurate
C AD BD B A D