Why are Petri dish cultures incubate in the inverted position ie. agar layer uppermost?

Question

Aseptic Techniques In Microbiology

Answer 1

This is so the condensation that forms will not be on the growth surface and inhibit bacterial growth. The bacteria will grow on the moist, but not wet, agar surface fine. The condensation will form
on the lid and not be a problem for the bacteria.

Best wishes! Hope I helped!

Answer 2

In microbiological and biochemical engineering studies, one almost always deals with a pure culture or a mixture of known cultures, except perhaps in wastewater treatment studies. Unless aseptic culture techniques are followed strictly, an originally pure culture will definitely become contaminated with other unwanted species. For illustrative purposes, an extraterrestrial who has never seen a human being simply cannot accurately study human behavior if the group of subjects to be observed includes, in addition to humans, monkeys, dogs, cats, and many more other "contaminants." The results of such a study will certainly be unreliable. Similarly, the use of a contaminated culture with unknown microorganisms will only lead to incredible results that are of little value. Thus, the isolation and maintenance of a pure culture is of utmost importance in many microbiological studies.

Answer 3

It is so the condensation that forms on the plastic doesn't drip down and spread out the bacteria. If a water droplet hit the surface on a colony it could spread the colony out. Then you wouldn't know if that spot came from one single cell or if the colony got broken up and it is now multiple spots on the agar.

Answer 4

hi, (ANS) the respond is unquestionably No! because of the fact there is no such subject as GOD, God is a theory or build invented by skill of people for the earnings of human beings. **Examples of different human constructs are, Time & funds & Capitalism itself. people beings hate, & concern the existential actuality of actuality, people can not manage the reality there there in basic terms would not be a god in any respect. can not face the reality that as quickly as you die thats it your long previous from this actuality & you wont be coming returned ever!! thats why people prefer the belief of a god not something extra. **with out exception all prepared religions are approximately 2 issues in basic terms. No.a million The politics of controlling peoples spirituality. No.2 Controlling females. **As an atheist its my theory that we got here from the primal void & thats the place each and every physique finally end up i.e. returning returned to the primal void. The earth & this finished actuality got here from the void & will finally end up returning there in some unspecified time interior the destiny in destiny time, its in basic terms stupid people that can not face the reality of this. IR

Answer 5

I'm guessing here but it could be because heat rises. To allow the specimens to grow quicker it is placed upside down so that the specimen will be on the warmest part of the dish.

Answer 6

so any condensation stays on the bottom of the petri dish

Answer 7

so when condensation forms, it drops down and does not drown whatever you are growing.