Question

Why do plants living in dry habitats have thicker epidermis?
​

Answer 1

$\huge{❥}\:{{{\purple{\boxed{\tt{\pink{\red{A}\pink{n}\orange{s}\green{w}\blue{e}\purple{r}}}}}}}}$

The epidermis of plants living in dry habitats is thicker for better retention of water and to protect from loss of water in form of water vapour...

Answer 2

The epidermis may be thicker since protection against water loss is critical.