The brain of the average human being contains approximately 86 billion __________

Mara enjoys hanging out with her friends, all of whom are very "up" on each other's information. They all share secrets with each other, and though there little troupe is only made up of 5 girls,

they seem to have no real need or desire to interact with other kids their own age. Mara's group would be described as a: a. clique b. crowd c. cache d. cohort

The type of agnosia in which people have difficulty recognizing faces is ___________

Fill in the blank with the appropriate word.