Foraging Behavior Among Beavers
Listen to part of a lecture in a biology class.
- What is the lecture mainly about?
- A. Different foraging strategies among animals.
- B. Methods beavers use to gather building materials.
- C. Decisions beavers make about where to live.
- D. Choices beavers face when foraging.
- What difference between aspen trees and ash trees does the professor point out?
- A. Aspen trees are easier to transport.
- B. Aspen trees provide better wood for construction.
- C. Aspen trees provide less nutrition for beavers.
- D. Aspen trees have more overall value to beavers.
- What does the professor identify as the two central issues involved in beavers foraging behavior?
[CHOOSE 2 ANSWERS]
- A. How far from home to forage.
- B. How to cope with competition.
- C. What size tree to cut down.
- D. What time of year material for construction is available.
- What does the professor say about the cutting down of large trees?
- A. Beavers generally prefer cutting down large trees to small trees.
- B. Beavers generally do not travel long distances to cut down large trees.
- C. Beavers will not cut down large trees of certain species.
- D. Beavers use large trees mainly for the purpose of building shelters.
- According to the professor, why do beavers generally forage at night?
- A. Beavers are safer from predators if they forage at night.
- B. Foraging at night requires less energy than foraging in the daytime.
- C. Beavers stay with their offspring during the daytime.
- D. Beavers face less competition for food from other animals during the night.
- Why does the professor say this: 🎧
- A. To explain her reasoning.
- B. To indicate why her belief was wrong.
- C. To give an example of a decision beavers make.
- D. To explain the reason beavers travel far for wood.
D D AC B B A