3. Cut two 3-by-12 inch strips of material from the nylon stocking. 4. Place both strips on a piece of white paper and rub them briskly in your hand.
5. With your fingers, lift the two pieces of nylon and hold them side by side.
B. What happens and why?

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".

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

answer///multiple alleles;