1. What does the passage mainly discuss?
A. The mass migration of ants B. How ants mark and follow a chemical trail
C. Different species of ants around the world D. The information contained in pheromones
2. The word “forage” in the passage is closest in meaning to ___________
A. look up B. walk toward C. revolve around D. search for food
3. The word “intermittently” in the passage is closest in meaning to _____________
A. periodically B. incorrectly C. rapidly D. roughly
4. The phrase “the one” in the passage refers to a single ____________ A. message B. dead ant C. food trail D. species
5. According to the passage, why do ants use different compounds as trail pheromones?
A. To reduce their sensitivity to some chemicals B. To attract different types of ants
C. To protect their trail from other species D. To indicate how far away the food is
6. The author mentions the trail pheromone of the leafcutter ant to point out
A. how little pheromone is needed to mark a trail
B. the different types of pheromones ants can produce
C. a type of ant that is common in many parts of the world
D. that certain ants can produce up to one milligram of pheromone
7. According to the passage, how are ants guided by trail pheromones?
A. They concentrate on the smell of food.
B. They follow an ant who is familiar with the trail
C. They avoid the vapor spaces by moving in a straight line.
D. They sense the vapor through their antennae.
8. The word “furnish” in the passage is closest in meaning to
A. include B. provide C. cover D. select
9. The word “oscillating” in the passage is closest in meaning to
