Nail roots are to nails as what is to hair?
a. sebaceous gland
b. keratin
c. hair follicle
d. melanocyte

The chromosomal structure that limits the number of cell divisions of a cell is the the chromosomal structure that limits the number of cell divisions of a cell is the kinetochore telomere histones centromere

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity