托福口语 Task 4

Today, we're going to talk about a fascinating concept in biology called 'behavioral adaptation.' This refers to how animals develop specific behaviors over time to increase their chances of survival in their environments. One key point is that these behaviors are not learned but are innate, meaning they are genetically programmed. Let me give you two examples to illustrate this. First, consider the monarch butterfly. Every year, millions of monarchs migrate over 3,000 miles from Canada to Mexico to escape the cold winter. This incredible journey is not taught by older butterflies; each new generation instinctively knows the route and the destination. Second, think about the three-spined stickleback fish. When a predator approaches, these fish display a 'zigzag' swimming pattern. This behavior confuses the predator and makes it difficult to catch them. Again, this is an inherited response, not something they learn from experience. So, behavioral adaptations are crucial for survival, and they are passed down genetically.