1 .Why are ants compared to ecosystem engineers?
A.Because they build their own nests.
B.Because they collect food.
C.Because their activity affects the environment.
D.Because they are predators.
2. As predators, ants
A.prey on small as well as large animals.
B.collect nutritious food from the soil
C.collect food as decomposers.
D.prey on species much higher up the food chain.
3. Dirk Sanders study centered on how ants
A.can manage to thrive in huge numbers.
B.defend their resources and territory against other predators.
C.attack those invading animals for survival.
D.produce such a big impact on the environment.
4. What does paragraph 6 tell us?
A.Ants bring about a negative influence to an area when their population is small.
B.Ants bring about a positive influence to an area when their population is small.
C.Ants predation counteracts the positive influence they may have on an area.
D.At higher density, ants produce a positive influence on an area.
5. What still remains unclear about ants, according to the last paragraph?
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