What is the development reason that the hormone human chorionic gonadotrophin is a good indicator of pregnancy

In this experiment you were asked to present three possible mechanisms. describe those mechanisms here and include drawings of those mechanisms. how will the bromination of trans-cinnamic acid and trans-stilbene allow you to distinguish between the three possibilities? what would you expect to find in your data in each scenario?

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

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?