Touching the lip of the bottles can lead to contamination from airborne microorganisms. These microorganisms can affect the purity of the culture and compromise the results of the experiment. Additionally, it can introduce unintended microbes into either the source bottle or the bottle being inoculated, leading to unreliable outcomes.
Spreading is done carefully on agar plate as we have to prevent even a minute to minute contamination and also we have to check that weather the spreading is done equally or not while not demaging the layer of agar.
To prevent contamination. Once you have flamed your loop and cap, do not lay it down, blow on it, touch it with your fingers, or touch it to any surface other than your inoculum or the sterile media.If you do, you must reflame the loop before proceed to inoculation to re-sterile it again.
you should tell a parent
No, brake pads should not be constantly touching the rotor. They should only make contact when the brakes are applied to slow down or stop the vehicle.
Pop them by touching them!
It should not be touching the ears or the collar of a polo
yes you should if you know in your heart he loves you
wash your hands with soap.
You can lay something heavy on it but it should stretch out when filled.
Outside, which is where you should go if you're in a smoke filled area.
By sitting in it.