The __________ is where nutrients and wastes are exchanged between the mother and the developing organism

For adolescents, describing a first sexual partner as "someone I love" is to ____ as describing a first sexual partner as "a casual date" is to ____

a. males; females b. females; males c. older adolescents; younger adolescents d. younger adolescents; older adolescents

When you tell jokes and your friends laugh, you are more likely to tell jokes to your friends. Your friends are _______ for telling jokes

a. discriminative stimuli b. S-deltas c. punishers d. conditioned stimuli