Many introducespecies havhadeleterious effects on communities anecosystems because
A) coevolved parasites and pathogens are absent.
B) the introduced species are long-lived.
C) predators prefer the introduced species, and the local prey therefore proliferate to dangerously high levels.
D) the community from which they came lost an important predator, competitor, or parasite.
E) human beings do not know how to appreciate them.
Correct Answer:
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Q46: Which of thfollowing represents an early stagin
Q47: Pioneer plants species arusually characterizeby
A)small size.
B)efficient dispersal
Q48: In a natural community, thprimary consumers are
A)herbivores.
B)carnivores.
C)scavengers.
D)decomposers.
E)all
Q49: Populations arhelin check by
A)resource partition.
B)predation.
C)social parasitism.
D)competition.
E)all of
Q50: Exotic species that arintroduceinto a non-nativhabitat usually
A)interbreed
Q51: Secondary succession can occur
A) after a fire.
B)
Q52: Endemic means a species
A)evolved in one geographic
Q53: A keystonspecies is
A)a single dominant species.
B)in control
Q54: Which of thfollowing combinations of organisms coulbexpecteto
Q55: Which of thfollowing statements is FALSE?
A)Succession is
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