Rory has been diagnosed with ADHD. He is often impulsive and is prone to emotional outbursts. He has difficulty making plans and carrying them out. According to the textbook, lobe deficits may play a role in Rory's ADHD.

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.

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone