<span>"Autotrophs are the producers in a food chain, such as plants on land or algae in water" </span>
Answer:
Here ya go ;) Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio (base pair rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
I am the one no need a bow to get respect
B) Pesticides.
Hope that helps, Good luck! (: