Gene flow is the movement of alleles among populations of organisms. it tends to reduce among populations over time.

Gene flow is the movement of alleles among populations of organisms. It tends to reduce among populations over time.

A)fitness

B)variation

C)conservation

D)survival

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds