The first life form to appear on earth were most likelya. complex single celled organismsb. complex multicellular organismsc. simple single-celled organismsd. simple multicellular organisms

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.