Band 7.5 — Process: The Life Cycle of the Butterfly
📄 Bài mẫu band 7.5
The diagram shows the stages in the life cycle of the butterfly.
Overall, the cycle consists of four main stages of development, from egg to adult insect, and it is continuous, since each new adult lays the eggs from which the next generation grows.
The cycle begins when the adult female lays her eggs on the surface of a leaf. After a short period, a caterpillar hatches from each egg. During this second stage, the caterpillar feeds almost constantly on leaves and grows quickly, shedding its skin several times as its body lengthens.
When it reaches full size, the caterpillar attaches itself to a stem and forms a hard case around its body, which is known as a chrysalis. Inside this protective shell, its body is gradually transformed. In the final stage, the case splits open and an adult butterfly emerges. Once its wings have dried and strengthened, the new adult flies away and, in time, lays eggs of its own, so that the entire cycle begins once more.