Agar is an excellent solidifying agent for microbiological media because
A. it is not degraded by most microorganisms and solid agar remains solid until the temperature is raised to 90°C, and liquid agar remains liquid if the temperature is lowered to 45°C are correct.
B. it is not degraded by most microorganisms.
C. solid agar remains solid until the temperature is raised to 90°C, and liquid agar remains liquid if the temperature is lowered to 45°C.
D. agar provides an excellent source of nutrition for a variety of different microorganisms.
Answer: A
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