动物生命周期
Animal Life Cycles
描述哺乳动物、两栖动物、昆虫和鸟类生命周期的差异，比较变态发育与直接发育的不同。
Describe differences in the life cycles of mammals, amphibians, insects, and birds, comparing metamorphosis with direct development
学习证据 / Evidence
- 描述哺乳动物、两栖动物、昆虫和鸟类的生命周期，并说出各自的关键阶段。
- 比较变态发育（形态彻底改变）与直接发育（逐渐长大）之间的区别。
- 辨别哪些动物类群会发生变态发育，哪些不会。
- Describe the life cycle of a mammal, amphibian, insect, and bird with key stages for each
- Compare metamorphosis (complete change of form) with direct development (gradual growth)
- Identify which groups undergo metamorphosis and which do not
评估问题 / Assessment
{{name}}能解释蝴蝶的生命周期（卵、毛毛虫、蛹、蝴蝶）与小狗长成大狗的过程有什么根本不同吗？
Can {{name}} explain how a butterfly's life cycle (egg, caterpillar, chrysalis, butterfly) is completely different from how a puppy grows into a dog?