What is one difference between dna and rna? a) only dna contains the base adenine. b) only rna contains the base guanine. c) only rna contains the sugar fructose. d) only dna contains the sugar deoxyribose.

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

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

In "the pig," what is the main effect that the piglet initially has on kibuka?