Question

catterpillars need to shade there skin when they grow bigger but humans do not why?

Answer 1

Caterpillars are the larval forms of butterfly .Caterpillars shed their skin 3-5 times while they grow and this process is known as Molting.Their skin never grows as like human skin grows ,so while growing they had to crawl out their skin when their skin becomes too tight .After first molting they brings new skin covers and in the mean  time some caterpillars also eat their shed old skin .After they grow more ,they again shed their skin .

But in case of humans shedding of whole skin does not occurs because as human body grows ,cells also grows .In humans shedding of only dead skin cells occurs .

The skin of caterpillars never grows. As their body grows, they have to move out of their skin because it becomes too tight for them. This process takes place 3 to 5 times in caterpillars till they are fully grown. In humans, skin cells also grow with the body. Only shedding of dead skin takes place in humans.