Which of the following is not true regarding Entamoeba histolytica?
A. Entamoeba histolytica cysts pass through the stomach unharmed.
B. Entamoeba histolytica produces enzymes that degrade epithelial tissue.
C. Entamoeba histolytica always remains in the intestinal tract during an infection.
D. Entamoeba histolytica grazes on bacteria in the intestines.
Answer: C
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Nitrogen has a higher electronegativity than hydrogen. As a result you would expect that ammonia (NH3) molecules can form ____ with each other
A. ionic bonds B. hydrophilic bonds C. hydrogen bonds D. cohesive bonds E. covalent bonds
Ammonia (NH3) is converted to nitrite (--NO2) by
A. decomposers. B. nitrogen-fixing bacteria. C. nitrifying bacteria. D. denitrifying bacteria.
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What will be an ideal response?
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