Among the so-called recreational or illicit "designer drugs" is a dissociative anesthetic that produces a sense of detachment along with a reduced awareness of pain. It is called

Which theory of language acquisition combines several schools of thought to hypothesize that language development is produced through a combination of genetic predispositions and environmental circumstances that help teach language?

a) universal grammar b) interactionist perspective c) learning theory approach d) language-acquisition device

What is the most important factor in determining what crosses the "placental barrier"?

a. The size of a molecule b. The age of the fetus c. The duration of the pregnancy d. The age of the mother