7. in a food chain, concentrations of harmful substances increase in higher trophic levels in a process known as a. biological magnification. b. genetic drift. c. biological succession. d. pesticide resistance.

Why do you think the puppy litter was all dark-haired?

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.