The cells in the meristematic region of the root are undergoing
a. meiosis.
b. sexual reproduction.
c. binary fission.
d. mitosis.

Place the steps tor the formation of the enzyme pepsinogen in correct order

Which direction does the energy flow in this energy pyramid ?

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