0 vote
An antibiotic is
An antibiotic is
1). a chemical synthesized by a human cell against a microorganism
2). a chemical synthesized by a micro-organism againstan-x other micro-organism
3). sa substance produced by blood cells against bacteria
4). a substance produced by blood cells against infection.
1 answers
3 vote
option 2 : - a chemical synthesized by a micro-organism againstan-x other micro-organism
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