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Life Processes › ViewInfection and bleeding of gums can be prevented by having foods rich in ___________.
A. Iron
B. Calcium
C. Vitamin C
All About Bacteria › View
For science experiments, it is important to set up an incubator of _______________ so that the growth of the bacteria can be easily seen.
A. 85-100 °F
B. 60-75 °F
C. 30-45 °F
D. 0-15 °F