History-graded influences explain why ___________ tend to be alike in ways that set them apart from people born at other times.

American and British English are considered to be mutually __________ because the speakers of either dialect can usually understand speakers of the other dialect.

Fill in the blank(s) with the appropriate word(s).

The physical size and shape of the two cerebral hemispheres of right-handed persons is more alike than that of left- handed persons

Indicate whether this statement is true or false