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What is an example of a microorganism acting in a harmful way?
a) bacteria spoiling food
b) bacteria aiding digestion
c) yeast used to make pizza crust
d) fungi decomposing waste in a septic tank

Respuesta :

Answer:

A

Explanation:

B, C, and D are benefits. Bacteria spoiling food is very harmful to the food and to whoever eats it.

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