3. The passage suggests that the lack of an observed decline in the fecundity of the creeping dogwood strengthens the researchers conclusions regarding pesticide use because the
（A） creeping dogwood is a species that does not resemble other forest plants
（B） creeping dogwood is a species pollinated by a broader range of insect species than are most dogwood species
（C） creeping dogwood grows primarily in regions that were not sprayed with pesticide， and so served as a control for the experiment
（D） creeping dogwood is similar to the red-osier dogwood， but its insect pollinators are known to be insensitive to the pesticide used in the study
（E） geographical range of the creeping dogwood is similar to that of the red-osier dogwood， but the latter species relies less on seeds for reproduction
4. The passage suggests that which of the following is true of the forest regions in New Brunswick sprayed with most anti-budworm pesticides other than Matacil？
（A） The fecundity of some flowering plants in those regions may have decreased to an even greater degree than in the regions where Matacil is used.
（B） Insect mortality in those regions occurs mostly among the larger species of insects， such as bumblebees.
（C） The number of seeds produced by common plant species in those regions is probably comparable to the number produced where Matacil is sprayed.
（D） Many more plant species have become extinct in those regions than in the regions where Matacil is used.
（E） The spruce budworm is under better control in those regions than in the regions where Matacil is sprayed.
5. It can be inferred that which of the following is true of plant fecundity as it is defined in the passage？
（A） A plant’s fecundity decreases as the percentage of unpollinated flowers on the plant increases.
（B） A plant’s fecundity decreases as the number of flowers produced by the plant decreases.
（C） A plant’s fecundity increases as the number of flowers produced by the plant increases.
（D） A plant’s fecundity is usually low if the plant relies on a small number of insect species for pollination.
（E） A plant’s fecundity is high if the plant can reproduce quickly by means of vegetative growth as well as by the production of seeds.
