CLEP Biology ACTUAL EXAM QUESTIONS WITH
COMPLETE SOLUTION GUIDE) (MULTIPLE
CHOICES) (A+ GRADED 100% VERIFIED) LATEST
VERSION 2025
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1. In which of the following ways do social insects
benefit most from having several types or castes
within the species?
(A) Each colony is able to include a large number of
individuals
(E) The specialized
(B) The secretions or odors produced by the
structure of each caste
protective caste are an effective defense
permits division of labor
(C) The division of the species into castes ensures
and greater efficiency.
the survival of the fittest
(D) Large numbers of the worker caste can migrate
to start new colonies
(E) The specialized structure of each caste permits
division of labor and greater efficiency.
2. The greatest diversity of structure and of methods
of locomotion is exhibited in the individuals of ______
(A) a class
(E) a phylum (B) a family
(C) an order
(D) a species
(E) a phylum
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,5/8/25, 7:38 AM CLEP Biology ACTUAL EXAM QUESTIONS WITH COMPLETE SOLUTION GUIDE) (MULTIPLE CHOICES) (A+ GRADED 100…
3. Of the following, which is an example of a
mutualistic relationship?
(A) The protozoan Trichonympha digesting wood in
the gut of a termite
(A) The protozoan (B) The sporozoan Plasmodium reproducing in
Trichonympha digesting human blood cells and liberating toxins into the
wood in the gut of a human body
termite (C) Two species of Paramecium deriving food from a
common laboratory culture
(D) Rabbits being eaten by foxes
(E) Humans inadvertently providing food for
cockroaches
4. Evidence that multicellular green plants may have
evolved from green algae is best supported by the
fact that in both
(C) chlorophylls a and b (A) the gametophyte generation is dominant
are photosynthetic (B) the sporophyte generation is dominant
pigments (C) chlorophylls a and b are photosynthetic
pigments
(D) xylem vessels are pitted and spiraled
(E) male gametes are nonflagellated
5. All of the following statements concerning the
light-capturing reactions of photosynthesis are true
EXCEPT
(A) An initial event is the excitation of electrons in
chlorophyll by light energy.
(D) If captured, some of
(B) The excited electrons are raised to a higher
the energy of the excited
energy level.
electrons is used to split
(C) If not captured, the excited electrons drop back
carbon dioxide into
to their initial energy levels.
carbon and oxygen.
(D) If captured, some of the energy of the excited
electrons is used to split carbon dioxide into carbon
and oxygen.
(E) Light is absorbed by pigments that are
embedded in membranes.
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, 5/8/25, 7:38 AM CLEP Biology ACTUAL EXAM QUESTIONS WITH COMPLETE SOLUTION GUIDE) (MULTIPLE CHOICES) (A+ GRADED 100…
6. Which of the following statements best explains
the hypothesis that the development of sexual
reproduction has resulted in acceleration of the rate
of evolution?
(A) Mutations are more likely to occur in
spermatogenesis and oogenesis than in mitotically
(E) Sexual reproduction is
dividing cells.
more likely to result in
(B) Sexual reproduction results in more offspring
genetic recombination
than does asexual reproduction.
than is asexual
(C) Those members of a species that are best
reproduction.
adapted to their environment are most likely to be
successful in sexual reproduction.
(D) Mutations usually do not occur in the production
of spores or in cells dividing by fission.
(E) Sexual reproduction is more likely to result in
genetic recombination than is asexual reproduction.
7. A frog skeletal muscle contracts in response to an
electrical stimulus. Increase of the stimulus intensity
by 50 percent will increase the strength of response
nearly 50 percent. If the intensity is again increased
50 percent, the response will increase only about
another 25 percent. Further increase in the stimulus
intensity produces no further increase in response.
(E) The fibers of a muscle The observations above are best explained by
have varying thresholds which of the following?
for response. (A) A muscle functions with an all-or-none
mechanism.
(B) Muscle-fiber sarcolemma is electrically resistant.
(C) The fibers of a muscle do not all contract at the
same rate.
(D) The fibers of a muscle fatigue at varying rates.
(E) The fibers of a muscle have varying thresholds
for response.
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