Why do mammals lack mucus glands in their skin?
A. The skin is not slippery.
B. This skin is tough.
C. The epidermis has many layers of cells.
D. The skin is not respiratory.
Answer:D
Why do mammals lack mucus glands in their skin?
A. The skin is not slippery. B. This skin is tough. C. The epidermis has many layers of cells. D. The skin is not respiratory.