Hair is produced at the base of hair follicles from columns of cells that die when they are filled with keratin.

true or false?

which of the following is not made up of keratin?
a.

fingernails

c.

sweat glands
b.

hair

d.

epidermis

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Why does the skin of your finger shrink when you wash clothes for a long time?

Differentiate renewable and nonrenewable resources