The word “displaces” in the passage almost means “_____”.

The word “volume” in the passage refers to ______.

What happens when something is immersed in a fluid?

According to the information in the passage, all of the following terms

refer to ants belonging to the genus Formica EXCEPT the

What happens when a mixed colony of Polyergus and Formica ants

becomes too large?

The word “recruit” in line 20 is closest in meaning to

Which of the following is a task that an ant of the genus Polyergus might

do?

What does the author mean by stating that “The dulotic species of

ants...are the supreme social parasites” (line5) ?

The author mentions cuckoos and cowbirds in line 2 because they

The word “raise” in line 1 is closest in meaning to

Which of the following statements best represents the main idea of the passage?

The subsurface soil in the Arctic's tundra is most comparable to which of the following?

A. slice 

All of the following are mentioned as having made travel in the summer difficult EXCEPT

A. mechanics 

The word “standing” in line 25 is closest in meaning to

For how many months of the year were temperatures below freezing in the circumpolar region?

Which of the following terms is used to describe the landforms of the

Arctic region?

The word “domain” in line 6 is closest in meaning to

What does the passage mainly discuss?