Which of the following is NOT mentioned in the passage as an advantage derived by birds that huddle together while sleeping?
A.Staying together provides a greater amount of heat for the whole flock
B.Some members of the flock warn others of impending dangers.
C.Some birds in the flock function as information centers for others who are looking for food.
D.Several members of the flock care for the young.

Which of the following statements about lesser and common kestrels is true?
A.The lesser kestrel and the common kestrel have similar diets.
B.The common kestrel nests in larger flocks than does the lesser kestrel.
C.The lesser kestrel feeds sociably but the common kestrel does not.
D. The common kestrel nests in trees; the lesser kestrel nests on the ground.

The word “forage” in line 10  is closest in meaning to _____
A.fly    
B. assemble 
C.rest          
D.feed

The author mentions “kinglets” in line 7 as an example of birds that _____   
A. protect themselves by nesting in holes 
B.nest with other species of birds
C.usually feed and nest in pairs
D.nest together for warmth

The word “magnified” in line 5 is closest in meaning to _____
A.caused           
B.intensified    
C.modified    
D.combined

Ptarmigan keep warm in the winter by _____
A.building nests in trees        
B.huddling together on the ground with other birds 
C.digging tunnels into the snow  
D.burrowing into dense patches of vegetation

Daniel said that if he had to do another  homework tonight, he would not be able to attend the concert.                                                                                                                    
A.if he had
B.another 
C.would not be able
D.to attend

Kangaroos use their  long and powerful  tails for balance themselves when sitting upright or jumping. 
A.their
B.powerful
C.for
D.when sitting

There are about 350 species and subspecies of birds in danger of become  extinct, with a large number of them , 117 in all , found on oceanic islands.  
A.are
B.become 
C.of them 
D.in all

The total thickness of the ventricular walls of the heart are  about three times that of the atria. 
A.walls
B.are
C.about
D.that