Final answer:
Joining an -H and an -OH group results in the formation of water (H2O), which is a condensation reaction.
Step-by-step explanation:
When the -H and -OH ends are joined together, a molecule of water (H2O) is formed. This reaction is a classic example of a condensation reaction, where two molecules combine to form a larger molecule and a smaller molecule, typically water, is released as a byproduct. It is a simple and common reaction that occurs in many biological and chemical processes.