昆虫的变态发育类型
Types of Metamorphosis
完全变态与不完全变态。完全变态：卵→幼虫→蛹→成虫（蝴蝶、甲虫、苍蝇）。不完全变态：卵→若虫→成虫——若虫长得像成虫的小版本，随着生长会蜕皮（蝗虫、蜻蜓、蟋蟀）。为什么有些昆虫要彻底变化，而另一些却逐渐长大呢？
Complete vs incomplete metamorphosis. Complete: egg → larva → pupa → adult (butterflies, beetles, flies). Incomplete: egg → nymph → adult — the nymph looks like a small version of the adult and moults as it grows (grasshoppers, dragonflies, crickets). Why do some insects transform completely while others grow gradually?
学习证据 / Evidence
- 比较完全变态和不完全变态，在示意图上描述各自发育的各个阶段。
- 将至少三种昆虫归入正确的变态类型，例如蝴蝶（完全变态）和蝗虫（不完全变态）。
- 解释若虫和成虫长得很像，而幼虫和成虫的形态完全不同。
- Compare complete and incomplete metamorphosis by describing the stages of each on a diagram
- Classify at least three insects into the correct metamorphosis type such as butterfly (complete) and grasshopper (incomplete)
- Explain that nymphs resemble adults while larvae look completely different from their adult form
评估问题 / Assessment
{{name}}能解释蝴蝶和蝗虫生命周期的区别吗——为什么毛毛虫看起来和蝴蝶完全不一样，而蝗虫宝宝已经长得像小蝗虫了？
Can {{name}} explain the difference between a butterfly's life cycle and a grasshopper's — why the caterpillar looks nothing like the butterfly, but a baby grasshopper already looks like a small grasshopper?