Hiv is the virus that causes aids. in the mid-1990s, researchers discovered an enzyme in hiv called protease. once the enzyme's structure was known, researchers began looking for drugs that would fit into the active site and block it. if this strategy for stopping hiv infections were successful, it would be an example of what phenomenon?

   Competitive inhibition

Explanation:  Competitive inhibition means that a chemical substance, so in this case, the drug is inserted and competes with an enzyme detected in the HIV virus. So a chemical substance, a drug, inhibits, or simply takes the active place of a detected enzyme called protease, and inhibits its effect by competing with it, so the drug substance competes with a enzyme protease for binding.

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.