Where along a river would the water be clean for swimming or fishing help

Identify and describe the three ways that mutations affect organisms.

Find the mass, in grams, of 5.00*10^23 molecules of f2

If a straight-chain hydrocarbon is a gas at room temperature, how many carbon atoms will it have? a. 6 carbon atoms b. 12 carbon atoms c. 24 carbon atoms d. 3 carbon atoms