Why is agar a useful substance in the microbiology lab?
a) agar dissolves in water at about 60 C
b) Agar does not solidify until it cools to about 40 C
c) Agar is a good source of nutrients for microbes
d) Solid agar melts at temperatures about 40 C
Answer: b) Agar does not solidify until it cools to about 40 C
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