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Bacteria love to grow in moist damp places - if you haven't noticed, condensation causes water droplets to form on the top of the lid and if you incubated the plate with lid on top when the water runs down the sides of the plate it can easily contaminate your culture.
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∙ 11y ago
Wiki User
∙ 15y agoThe reason is to prevent condensation which the water formed can drop onto the agar and interfere with the growth of the bacteria. It also can smear and affect the observation of growth.
Wiki User
∙ 13y agoto prevent the moisture that is formed during incubation from falling on whatever is in the petri dish.
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∙ 15y agoIf you dont, you get condensation on the lid. The condensation will drop onto the agar and contaminate or disturb your bacteria.
Wiki User
∙ 13y agoI had the same question. I would guess that the agar would last longer and stay fresher that way, i seriously dont know sorry
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∙ 10y agoIf they are not inverted, water forms on top of the plate and will drop on the surface "messing up" the colonies. They will be harder to ID.
Wiki User
∙ 11y agoTo avoid formation of moisture.
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Why is condensation on the agar undesirable?
It'll cause the spreading of the colonies that are growing on the agar surface if the condensed water falls on them. That's why usually the plates are inverted during incubation.
Why are agar plates stored inverted need two answers?
The condensation that forms inside the dish can cause streaking through the growth on the plates. Thus, causing poor or invalid test results.
What is pour plating?
Pour plating is a method of separating one species of bacteria from another by diluting one loopful of organism into three liquefied nutrient agar plates, with the hopes that one of the plates poured will provide an ideal sample for isolation.
What are unopened agar plates referred called?
they are the controlled plates
What type of boundary is formed when plates collide?
When plates collide it is called a convergent boundary.newtest3
Why are inverted plates during incubation?
Because during incubation moisture will form at the top of the petri dish. Inverting the dish prevents it from dropping into whatever you have in the petri dish.
Why is condensation on the agar undesirable?
It'll cause the spreading of the colonies that are growing on the agar surface if the condensed water falls on them. That's why usually the plates are inverted during incubation.
Why are petri plates inverted for incubation?
it is to prevent the moisture formed due to condensation of the agar ,to mix with the components present in the petri plates, else causes contamination
Why are agar plates stored inverted need two answers?
The condensation that forms inside the dish can cause streaking through the growth on the plates. Thus, causing poor or invalid test results.
Why did the instructions for making streak and spread plates emphasize inverting the plates before storing them for incubation?
inverting plate will allow fresh air mostly oxygen gas to pass through them and allow bacteria to grow
When did Mexico separate from South America?
Mexico (part of the North American Plate) and South American plates began to separate during the Triassic Period.
The use of plastic bags for anaerobic incubation?
For long incubation periods,esp. for spread plates ,the agar surface can be dehydrated and this can cause inhibition of low aw sensitive microorganism like gram- rod shape bacteria. For this reason the petridishes are packed in plastic bags
What lighting was used in medieval theater?
Lighting for indoor theatre during the medieval period was done with candles and sometimes with sunlight reflected with large brass plates.
What is a placoderm?
The placoderm is actually an extinct fish, thought to have lived during the Devonian period and is thought to have had broad flat bony plates covering its body.
Is there a grace period for late renewal of your license plates in California?
No
Predict the outcome of incubating inoculated streak and pour plates in the upright rather than the inverted position?
it will not minimize water evaporation, and it would be easier for contamination to take place
Is there a grace period for expired plates in Colorado?
30 days. If your plates expire in Jun 2012, then on Aug 1st you are subject to penalty.
