Most drugs that are sold on the illegal market are about 95 to 99 percent pure, containing only the drug itself. true false

Which rate indicates the number of children that would be born per women if she were to live to the end of her child-bearing years

Electrochemical cells provide energy by allowing electrons to flow through an external circuit to electrodes contained in an electrolyte

Mendel used over 28,000 pea plants in his experiment. how does this large sample size make his results more reliable? (i'm not sure about this one)