When an insect grows their shell does not, so they need to shed their old skin and then grow while their new skin grows.
All reptiles shed their skin. Reptile skin doesn't 'stretch' like ours does. Instead, when the current skin gets too tight, they grow another one underneath. They shed (or slough) the old skin, and the new skin allows them to grow a little more.
So they get a new better skin than the old one
Silkworms shed their skins because they are insect larvae, and this process is called molting, which allows them to grow. Humans do not shed their skin because the outermost layer of our skin constantly renews itself through a process called desquamation, where dead skin cells are shed gradually.
As snakes grow the skin doesn't grow with them, so they shed the skin because it no longer "fits" them. By shedding the skin they can get larger, and grow.
So that it can grow as it will have just grown out of it's old skin.
blue tongue lizards shed their skin because their scales don't grow so as they grow if they didn't shed skin their skin would just tear.
Yes, as they grow they will molt (shed their skin) a number of times before they pupate. Lar
Snakes shed their skin because it doesn't expand as they grow like ours does. When they emerge, their skin is soft for a while and they can grow larger.
Crabs grow out of their shells and they also shed their skin to do that. Meaning they molt their skin.
If your stick insect is a baby there wouldn't be much weight. Once they shed there skin there will be a slit change. They'll grow nearly every month or so. Now there will get heavier and heavier cos there growing!
Snakes shed their skin when they grow. Unlike us the skin does not stretch and grow with the body so they have to get rid of it to grow bigger. Snakes grow their whole lives so they are shedding all the time. That being said as a snake gets older it doesn't grow as much so they don't shed as often