Some tissues, such as those in skin, are soft. Others, such as bone are harder. How do differences among cells explain this variation in tissue? a. Cell walls grow in hard tissues but not soft ones.
b. Smaller cells arise in softer tissue, while larger cells arise in harder tissues.
c. Cells die in harder tissues and then get pressed into dense solids over time.
d. Cells in one tissue perform a different function from cells in a different tissue.