Question

Exoskeleton is made of horny epidermal scales, shields or scutes in _______

Answer 1

The exoskeleton is made of horny epidermal scales, shields or scutes in reptiles. The reptile skin is covered with horny scales, shields or scutes it distinguishes reptiles from animals of other classes. These scales, shields or scutes are horny and epidermal in origin.

So, the correct answer is 'Reptiles'.