การฟัง TOEFL

🎧 บทถอดเสียง

Listen to part of a lecture in a biology class. The professor is discussing animal communication. "Today we're going to talk about the complexity of animal communication, specifically focusing on the honeybee's waggle dance. For a long time, scientists believed that this dance was a simple signal indicating the direction of a food source. However, recent research has revealed that the dance is far more nuanced. The angle of the dance relative to gravity communicates the direction, while the duration of the waggle run indicates distance. But what's truly fascinating is that bees can adjust their dance based on the quality of the food source. If a nectar source is particularly rich, the dance is more vigorous and repeated more often, attracting more foragers. Conversely, if the food is of lower quality, the dance is less enthusiastic. Moreover, bees can also convey information about the type of food, such as pollen versus nectar, through the scent they carry. So, the waggle dance is not just a simple map but a sophisticated message that includes multiple layers of information, allowing the colony to make efficient foraging decisions."