(need healp asap 21pts ) what can cause attention deficit hyperactivity disorder (adhd)? a. low levels of gamma-amino butyric acid b. low levels of serotonin c. low levels of endorphins d. low levels of acetylcholine

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england