10. which statement accurately describes the relationship between the brain and addiction? a. normal activities produce heightened responses once receptors are reduced. b. all drugs act on dopamine synapses in the same way. c. a higher amount of addictive chemicals are needed to get the same high when fewer receptors are present. d. the brain reacts to excessive dopamine levels by increasing the number of dopamine receptors

Most of the world's booming population growth is occurring in countries that arenot highly industrialized. the high birthrates in these countries often result inlower standards of living. which of the following would be the best solution tothis global economic problem? o a. encouraging developing countries to participate in global tradeob. creating an international seed bank to protect biodiversityoc. forming strict regulations on greenhouse gas emissionso d. establishing international agreements to prevent overfishingis it a b c d