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If two different species of fish fossils were found in two different layers of sedimentary rock, what might one infer about the specimens?


A) The species in lower layer died first
B) They died at the same time
C) The species in the higher layer evolved from the species in the lower layer
D) The species in the higher layer died first

E) A) and C)
F) A) and B)

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Based on hierarchical levels of biological organization, which of these choices represents the broadest level?


A) Endocrine system
B) 3 toed sloths
C) School of piranhas
D) Amazon Basin

E) None of the above
F) All of the above

Correct Answer

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You have been assigned to address a problem of overpopulation of species X in a nearby county.One of the members of your team suggests introducing species Y, which is a natural predator of species X, but not normally found in the area.After some discussion, you go ahead and introduce species Y.What aspects of the hierarchical organization may be affected within a period of a several years?


A) organism, population, species
B) population, species, community, biosphere
C) population, species, community
D) population, community

E) C) and D)
F) B) and D)

Correct Answer

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The common ancestor that produced the most evolutionary recent derived characters is


A) 12
B) 9
C) 8
D) 6

E) A) and B)
F) None of the above

Correct Answer

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The most plausible explanation for the high number of spiders in plot 4 is:


A) there are too many flies overall.
B) there are no centipedes to prey on the spiders and there are abundant flies upon which to feed.
C) the spiders preyed on the centipedes and ignored the flies.
D) the flies and spiders worked together to eliminate the centipedes.

E) C) and D)
F) A) and C)

Correct Answer

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Both walnut and Gingko trees lose their leaves in the fall when day length starts decreasing.Based on these observations one may conclude that many tree species will lose their leaves in the fall in response to decreasing day length.This statement is an example of:


A) inductive reasoning
B) a theory
C) deductive reasoning
D) an experiment

E) A) and B)
F) B) and C)

Correct Answer

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While you are riding the ski lift up to the top of the mountain on a very cold day you start to shiver involuntarily.You know that the shivering is your body's attempt to help regulate your body temperature and is an example of what type of mechanism?


A) sensitivity
B) evolutionary adaptation
C) homeostasis
D) energy utilization

E) A) and B)
F) A) and C)

Correct Answer

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