What does the term biodegradable often refer to

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

What will happen if two of the base pairs of the stand of the dna are switched

What type of cell division is used to replace old cell?