Protection of Plants by Insect - TOEFL 托福閱讀考古題 Questions (一)
1.According to paragraph 1,floral nectar andextrafloral nectar are alike in that
A.they are likely to be produced by the same plants.
B.they basically consist of the same chemicalcomponents.
C.they attract only insects that will defend the plant.
D.they are produced by the same parts of the plant.
2.To say that ants are "persistent" defenders of plants means that
A.they defend plants against a wide variety of threats.
B.they continue to defend plants for as long as the plants are threatened.
C.they are successful defenders of plants.
D.they are easily observable defenders of plants.
3.What can be inferred from paragraph 2 about the ants that are attracted to theextrafloral nectaries?
A.They do not eat the leaves of the plants that produce extrafloral nectar.
B.They live almost entirely on extrafloral nectar.
C.They spend most of their energy guarding extrafloral nectaries.
D.They frequently fight among themselves over extrafloral nectar.
4.According to paragraph 3, what was the position of the opponents of the"protectionist" hypothesis?
A.Extrafloral nectar provides plants with a direct defense against attack by insects.
B.Ants substantially benefit plants that secrete extrafloral nectar.
C.The secretion of extrafloral nectar plays a role in the plant’s internal functioning.
D.Ants visit plants that secrete extrafloral nectar as often as they visit plants that do not.
5.The word "skeptical" in the passage is closest in meaning to
A.curious.
B.doubtful.
C.open-minded.
D.practical.
6.Which of the sentences below best expresses the essential information jn thehighlighted sentence in the passage Incorrect choices change the meaning in importantways or leave out essential information.
A.We now have ample proof that ants benefit plants.
B.Barbara Bentley has called for additional proof that ants benefit plants.
C.In 1977 Barbara Bentley conducted research that proved that all prior studies were wrong.
D.Proof that ants benefit plants will require many more observations and experiments.
7.According to paragraph 4, what effect does the destruction of the corolla have onplants.
A.It leaves the seeds exposed and unprotected.
B.It prevents the stigma from developing.
C.It keeps pollen grains from attaching properly.
D.It prevents the flower from attracting pollinators.