The area surrounding the cell nucleus is called the __________

Irritable vocalizations, sad facial expressions, and even hiccups, in an infant between 4 and 6 months of age, signify

a. social engagement. b. active protest. c. passive withdrawal. d. object engagement.

An evolutionary theorist might argue that facial expressions look similar and are interpreted similarly by adults across cultures because:

a. there is a gene for each facial expression. b. facial expressions help increase the chance adults will provide care for the child. c. babies are simply imitating adult facial expressions. d. facial expressions always match a particular underlying emotion in both infants and adults.