Which addictive substance became the most important item of export from north america?
select the best answer from the choices provided.
a)tobacco
b)coffee
c)opium
d)tea

What claim did thorne make? what evidence supported his claim?

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

In one or two well-crafted paragraphs in your laboratory journal, summarize the process in which normal cells become cancer cells. your paragraph(s) must include each of the terms listed below. underline each term in your writing: