HS.LS4B.a

DCI Description

(HS.LS4B.a) Natural selection occurs only if there is both (1) variation in the genetic information between organisms in a population e.g. mutations and sexual reproduction and (2) variation in the expression of that genetic information—that is, trait variation—that leads to differences in performance among individuals. Natural selection leads to populations that have more individuals with behavioral, anatomical, and physiological adaptations.