Antibiotics are not effective against cold and flu because these are caused by:
ABacteria
BProtozoa
CMoulds
DViruses
Answer & Solution
Correct answer: D. Viruses
1. Antibiotics kill or stop bacteria.
2. Cold and flu are viral.
3. Unneeded antibiotics reduce future effectiveness.
_Source: syllabus Science, Chapter 2, Microorganisms: Friend and Foe._
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