Cells that are specialized

a)are less complex.
b)perform different functions for the organism.
c)reproduce.
d)are stem cells.

Ineed to know why d is the correct answer asap

In "the man in the water," what was the remarkable occurrence that rosenblatt reported?

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food