The word "unprecedented" in the passage could best be replaced by

The words "the former" refer to

The word "prevailing" is closest in meaning to

With which of the following conclusions would the author probably agree?

Why does the author mention cottonwoods and willows?

Which of the following is closest in meaning to the word "ramifications" in paragraph 4?

What is the author's purpose in this passage?

The word "it" refers to

The pronoun "it" in paragraph 2 refers to__________.

According to the passage, what does the Great Basin lack?

The author mentions that all of the following are aware of quantities in some ways EXCEPT

What can be inferred from the passage about the fossils mentioned in the third paragraph?

The word “entombed” is closest in meaning to ______.

According to the passage, the Ice Ages often brought about

How would the author probably characterize the people who are mentioned in the first line of the second paragraph

What is the geographical relationship between the Basin and Range Province and the Great Basin?