Raul's father tells him not to slouch, and to put his shoulders back. What specifically must Raul do to improve his posture?
A. Depress his scapulae
B. Retract his scapulae
C. Medially rotate his humerus
D. Laterally rotate his humerus
Answer: B
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Fill in the blank(s) with the appropriate word(s).
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A bacterial endospore can...
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