through organisms which contaminate food like house fly
i have contaminate the food by putting my dirty hand on the food.
Two reasons: your food could contaminate your experiment, and the experiment could contaminate your food.
Yes
If it gets into food yes! It is poisonous.
Chemicals in the lab might contaminate the food - causing poisoning. The food might contaminate an experiment - making the results invalid.
One example is of a house fly that settles on any uncovered food in a kitchen, after walking on dog faeces out in the garden.
pests contaminate food by landing on the food and leaving there waste ,if you may, like flies whenever they land they vomit, leave waste, and urine. pests also contaminate food just by carrying diseases.
cross contamination
Some behaviors that can contaminate food include toileting, not washing hands, chewing fingernails, picking nose, bad body odor, and scratching face or behind.
Because saliva contains bacteria from your mouth.
Contaminate