The combining form alkal/o- means ________
A) acid; high pH
B) acid; low pH
C) base; high pH
D) base; low pH
C
Explanation: A) Alkal/o- means "alkaline (high pH)."
B) Alkal/o- means "alkaline (high pH)," the opposite of acidic (low pH).
C) Correct! Alkaline is also known as a base (high pH).
D) A base (alkaline) has a a high, not a low, pH.
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