According to the textbook, a healthy adult can hold about ___ items in short-term memory.

In the past, demographers portrayed the United States population in the shape of a demographic ______

Fill in the blank with correct word

The hammer, anvil, and stirrup are the three:

A) components of the eardrum. B) tiny bones in the middle ear. C) parts of the pinna. D) components of the basilar membrane.