In what pattern does the flow of energy in the ecosystem take place?

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

If the nucleus of a cell was removed the cell wouldn’t be able to make proteins because