Question: Using the examples from the lecture, explain the professor's main point about how mimicry helps harmless species survive.
🎧 听力讲座
Today we're going to talk about animal behavior, specifically about how some animals use a clever strategy called 'mimicry' to survive. Now, mimicry isn't just about looking like another animal—it can also be about acting like one, especially to avoid being eaten. One common form is when a harmless species imitates the appearance or behavior of a dangerous one. Take the viceroy butterfly, for example. It looks almost identical to the monarch butterfly, which birds avoid because monarchs taste terrible. By looking like the monarch, the viceroy is less likely to be attacked, even though it's perfectly tasty itself. Another example is the harmless milk snake. It mimics the deadly coral snake with its red, yellow, and black banding. Because predators have learned to avoid coral snakes, they also avoid milk snakes, giving the milk snake a survival advantage. So, in both cases, the key is that mimicry helps harmless species trick predators into thinking they're dangerous, reducing their risk of being eaten.
📝 参考答案
TOEFL Speaking Task 4 Scoring Rubric
Content Accuracy: Accurately restate the professor's main point
Information Completeness: Include key examples and details from the lecture
Language Use: Grammatical accuracy, vocabulary range, clarity
Delivery: Fluency and clarity of speech
Scored 0-30 based on holistic scoring (original 0-4, scaled to 30).
Answering Tips
Take quick notes on the main point and two examples during the lecture
Use the 20-second preparation time to organize your response
Start by stating the professor's main point, then explain with examples
Use template phrases: "The professor explains... For example..."
Keep your response within 60 seconds
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