In biology, the concept of 'mimicry' refers to the resemblance of one organism to another, often to gain a survival advantage. There are two main types: Batesian mimicry, where a harmless species imitates a dangerous one to avoid predators, and Müllerian mimicry, where two harmful species evolve to look alike, reinforcing predator avoidance. Mimicry is an adaptive trait shaped by natural selection.
🎧 Bài giảng
Professor: Today, let's look at a real example of mimicry. Consider the monarch butterfly and the viceroy butterfly. Monarchs are toxic to birds because they feed on milkweed, storing toxins. Birds learn to avoid them after tasting one. Viceroys, on the other hand, are not toxic, but they closely resemble monarchs in color and pattern. This is Batesian mimicry—viceroys gain protection because birds mistake them for monarchs and avoid eating them. Interestingly, recent research shows that viceroys may also be mildly toxic, suggesting a possible shift toward Müllerian mimicry, but the classic case remains a clear illustration of Batesian mimicry.
❓ Câu hỏi Question: Using the example from the lecture, explain the concept of Batesian mimicry.
📊 Tiêu chí chấm TOEFL Speaking Task 3
Delivery: Fluency, pronunciation, intonation
Language Use: Grammar, vocabulary, sentence variety
Topic Development: Accurately explain the reading concept and restate the lecture examples
Scored 0-30 based on holistic scoring (original 0-4, scaled to 30). 30s preparation, 60s response.
💡 Mẹo làm bài
Note the core concept definition from the reading (usually 1-2 sentences)
Record 1-2 specific examples the professor uses in the lecture
Start with the concept definition, then explain with lecture examples
Use template phrases: "The reading defines... The professor illustrates this by..."
Keep within 60s; ensure clarity and fluency
🎤 免费 AI 口语评分
基于 2800+ 托福真题评分库 · 无限次免费使用
⚠️ AI 自动评分基于托福官方口语三大维度（Delivery / Language Use / Topic Development）标准开发，结果仅供练习参考。
