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lakkis [162]
2 years ago
9

For a long time, penicillin was given to people to kill the bacteria which caused ear infections. Lately, some ear infections ar

e not cured by penicillin. Which is the best explanation for this?
Biology
1 answer:
Mrac [35]2 years ago
4 0

Answer:

Some bacteria have mutated and are not killed by the penicillin

Explanation:

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¿5. El sistema circulatorio humano consta de vasos, corazón y líquidos circulatorios. Los tipos de vasos son los siguientes: a.
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Answer:

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Explanation:

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4 years ago
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The amino acids are the building blocks of the proteins.  

Explanation:

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3 years ago
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