Speciation, ______, results when an animal population becomes isolated by some factor, usually geographic.

A. She won the 1945 Nobel Prize in literature.
B. She was the first woman to win a Nobel Prize.
C. She translated her books into many languages.
D. She advised many statesmen on international affairs.

A. he and Jennie argued recently.
B. he heard Jennie did poorly on the last test.
C. he doesn’t want to bother Jennie so late in the evening.
D. he’d rather study in his own dormitory.