Anew multicellular organism has been discovered, and scientists want to study the organism's cell structures, including
organelles. which microscope should they use?

most community's take hundreds of years to become stable

i think the answer is b.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

very