What is the force that attracts an object toward the center of another object?

gravity
mass
matter
pounds

What is histamine and what is its role in allergic reactions

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim