Examlex
One negative effect of tobacco is that it impairs _____ and nutrition and slows growth.
Qualitative Analysis
In microbiology, identification of bacteria present in a specimen by the appearance of colonies grown on a culture plate.
Substances
Materials or compounds that have a distinct physical presence and chemical composition.
Resident Normal Flora
Bacteria, fungi, and protozoa that have taken up residence either in or on the human body. Some of these organisms neither help nor harm the host and some are beneficial, creating a barrier against pathogens.
Pathogenic
Capable of causing disease when introduced into the body.
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