An enzyme is a molecule. a. polysaccharide
b. nucleic acid
c. carbohydrate
d. protein

How was the climate when the ambulocetus was alive

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions