Four of the five features listed below are
characteristic of bilaterally symmetrical organisms.
Select the exception.
a. sessile, nonmoving
b. three germ layers
c. cephalization
d. paired nerves, muscles, sensory structures
e. right and left halves of the body
Answer: a
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Which of the following best describes the type of bacteria found in your guts?
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ATP is the most important biological molecule that provides chemical energy. How does ATP release energy?
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Which of the following statements most accurately describes the expression of the repressor protein of the tryptophan operon?
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