Listen to part of a lecture in a biology class.
- What is the lecture mainly about?
- A. Explanations for a recent increase in the reindeer population
- B. Adaptations that enable reindeer to live in cold climates
- C. Differences between newborn reindeer and adult reindeer
- D. Changes in the reindeer’s food supply
- According to the professor, why is it necessary for newborn reindeer to be able to walk and run almost immediately?
- A. Newborn reindeer face intense competition from older reindeer.
- B. Reindeer herds have to travel long distances every day.
- C. Running and walking help reindeer maintain a stable body temperature.
- D. Running is the only way reindeer can protect themselves from predators.
- What does the professor say about the lower part of a reindeer’s legs?
- A. It stays warmer than the upper part of the leg.
- B. It is able to maintain the same temperature as the main part of the reindeer’s body
- C. It contains fat that changes texture at lower temperatures.
- D. It contains fat that is different from the fat in the upper part of the leg.
- What does the professor imply about lichens?
- A. They need reindeer in order to survive.
- B. They are more abundant than other arctic plants during the winter.
- C. They are more important to cows and sheep than they are to reindeer.
- D. They are the object of fierce competition among arctic animals.
- What does the professor say about the microbes in a reindeer’s digestive system?
- A. Some of the microbes protect the reindeer against harmful bacteria.
- B. Many of the microbes are transported into the reindeer’s body on lichens that the reindeer eats.
- C. The proportion of various microbes changes to accommodate changes in the reindeers diet.
- D. The microbes found in a newborn reindeer’s digestive system are very different from those found in an adult reindeer.
- Why does the professor say this: 🎧
- A. She wants to emphasize the importance of her previous point.
- B. She wants to illustrate her previous point with an example.
- C. She wants to return to the main topic of the lecture.
- D. She wants to clarify her previous statement.
B B D B C C