In the code 8E0VX63, the value of 3 means ________________

The pigment responsible for skin color is

A) melanin. B) keratin. C) collagen. D) elastin.

Capillary blood can be collected in:

A. capillary tubes B. special microcontainers or vials C. directly into test cartridges D. Only (a) and (b) are true. E. All (a-c) are true.