Listen to part of a lecture in a biology class. The professor is discussing the behavior of honeybees.
Professor: Today, I want to talk about how honeybees communicate, specifically about the famous 'waggle dance.' When a forager bee finds a good nectar source, she returns to the hive and performs a dance. The dance consists of a figure-eight pattern, with a straight run in the middle. The angle of this straight run relative to vertical indicates the direction of the food source relative to the sun. The duration of the run indicates the distance. For example, a dance lasting one second means the food is about one kilometer away. But here's an interesting twist: recent research suggests that this dance isn't just about direction and distance. It also encodes information about the quality of the food source. Bees perform more vigorous dances for higher-quality nectar, with more repetitions and faster waggles. This allows the colony to allocate foragers more efficiently. So, the dance is a sophisticated communication system, not just a simple signal. Now, can anyone think of how this might be affected by environmental factors, like wind or obstacles?
❓ 题目 What does the professor say about the waggle dance of honeybees?
A. A. It only communicates the direction of the food source.
B. B. It also indicates the quality of the nectar source.
C. C. The dance is unaffected by environmental conditions.
D. D. The angle of the dance indicates the distance to the food.
✅ 正确答案
B. It also indicates the quality of the nectar source.