Exoskeleton originated from (Eg feathers, nail horn, hoofs) : -

A: Chitinous exoskeleton is a characteristic feature of arthropods. R: It allows diffusion of water vapour from atmosphere to the body.

The major fibrous protein that provide external protection to vertebrate parts ilike Nails, horns and hoofs contain

Select the related word from the given alternatives : Foot : Mail : : Hoof : ?

Select the related word from the given alternatives : Paw : Cat : : Hoof : ?

What is the exoskeleton of arthropods made from and what is its function?

Evidence for the reptilian origin of birds is the occurrence of (a) Scales (b) Hairs (c) Claws (d) Feathers

Evidence for the reptilian origin of birds is the occurrence of (a) Scales (b) Hairs (c) Claws (d) Feathers