Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. two samples isolated from the deepwater horizon leak in the gulf of mexico were labeled a and b. the dna of each was isolated and the percent thymine measured in each sample. sample a contains 17.7 17.7 % thymine and sample b contains 28.9 28.9 % thymine. assume the organisms contain normal double‑stranded dna and predict the composition of the other bases.
acquired selection because you choose what traits are present and you acquire what traits you wanted.
by washing their hands every time they handle food or use the !
weathering is the name given to the process by which rocks are broken down to form soils
the source: soils.