several different amino acids join together to form a protein. how do any two types of amino acids differ from one another?

It all really depends on the side group the amino acid is on! For instance, out of the  20 side groups used to make proteins, there are only two main groups: polar and non-polar

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

catya your not at all which answer i've seen you do this on another question!