The scaly skin of a snake is to skin of a lizard.

The scaly skin of a snake is homologous to skin of a lizard.

Homologous is a term used to describe a part of two different animals that come from a common ancestor. This makes the part will have a very similar structure.
Other similar terms would be analogous where the part of the animals will have similar functions but comes from a different ancestor, thus have a different structure.

A- a reduction in biodiversity