The finger nails develop from the

Stratum germinativum is found in

The dermis of the skin of mammals is a structure produced by:

Which of the following is $NOT$ included in the exoskeleton of mammals?

$A$ substance responsible for making the $stratum \text{ } lucidum$ cells of the epidermis of the skin of a rabbit transparent is:

Which of the following directly helps in keeping the body warm?