Question

The ________ is the hard protective plate composed mostly of ______. skin, fiber cuticle, protein nail polish, oil onyx, keratin

Answer 1

The onyx is referred to as the hard protective plate which is composed mostly of keratin.

What is Onyx?

This is also referred to as natural nail and is found at the base of the fingers and toes of some organisms. This physical feature has different uses according to the animals involved.

It is composed of keratin which is a type of protein also present in the hair and is responsible for the tough properties however, the ones in the nails are harder.

This is therefore the reason why onyx and keratin was chosen as the most appropriate choice.

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