Why must a cell replicate prior to dividing

Which flexible structure that supports the nerve cord and led to the backbone

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.