How are air masses classified? a. by the direction they move b. by weather conditions they bring c. by their size and shape d. by the locations where they are formed

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane