15. a
reaction occurs when one nuclear reaction starts a series of 1 point
other nuclear fission reactions.
o
gamma
chain
fusion
fission
16 the type of energy used in nuclear power plants is
1 point

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

Which structure in the cardiovascular system connect arteries to veins?

Sperm are ejaculated from the corpora cavernosa of the penis. true or false