Question

what restrict growth in insects and how have overcome with restriction​

Answer 1

Answer:

Growth in insects is restricted by their exoskeleton made of chitin. They overcome this problem by molting. After the removal of old hard chitin layer, insects become covered with new soft chitin. While it is undergoing chemical changes, which result in its hardening, the insect has time to grow. Molting is regulated by special hormones.They get rid of the growth problem by Molting.

Answer 2

Chitin layer, which is present in exoskeleton area restricts the growth in insects.

EXPLANATION:

This process is executed by molting.  Once the old hard chitin layer is removed, new chitin layer is developed. After it undergoes the chemical changes, it results in hardening, the insects take enough time to grow. The special hormone regulates the molting process which is in steroid form. This process is called ecdysis. While molting insect cannot breath.