Four of the five structures listed below are

components of the human respiratory system. Select
the exception.
a. thoracic cavity
b. pleural sac
c. diaphragm
d. book lungs
e. larynx


Answer: d

Biology & Microbiology

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The axial skeleton includes which of the following?

a. phalanges b. ribs c. femur d. ulna e. metatarsals

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Which muscle is the “calf muscle”?

a. gluteus maximums b. biceps femoris c. gastrocnemius d. sartorius e. quadriceps femoris

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Initiation of transcription requires:a

a promoter sequence. b. DNA polymerase. c. an RNA primer. d. a DNA primer. e. Okazaki fragments.

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Food contains essential organic compounds that can be broken down in our bodies and used as nutrients. What must be present to make a molecule "organic?"

Biology & Microbiology