The water cycle is also referred to as the cycle.
a. watershed
b. hydrogen
c. oxygen
d. hydrologic

Match the digestive enzymes to the macromolecules they to digest. break down fats into glycerol and fatty acids break down carbohydrates into simple sugars break down nucleic acids into nitrogenous bases and simple sugars break down proteins into amino acids

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

The cluster of developing cells from conception until birth is called an