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white petroleum jelly is a substance like Vaseline, that is used in experiments for bacteria to grow and feed off.
How soon a specimen of something must reach the laboratory depends partly on the reason for which it is being sent to the laboratory, environmental conditions during storage and transit, and the stability of the substances the specimen consists of. A urine specimen must be refrigerated during storage and transit and arrive in the lab within an hour or two. It cannot sit out because warmth will allow bacteria, if present, to begin to grow in numbers.
You make a prediction based on something you know. So I know that table salt is sodium chloride (2 atoms). Epsom Salt is Magnesium Sulfate (MgSO4) which is 6 atoms. If we assume that the crystals grow at the same rate (same number of molecules per minute), then my prediction would be the Magnesium Sulfate will make bigger crystal structure, because of the bigger molecules. So I would expect the Epsom Salts to grow much faster - maybe up to 3 times faster. That would be a hypothesis that is testable and measurable.
No the plant would need water and sunlight.
It depends on the mineral that you are trying to form a crystal from. Any compound composed of an OH anion would grow well in an alkaline solution: NaOH, Sodium Hydroxide. Any compound composed of a H anion would grow well in an acidic solution: NaH, Sodium Hydrazine.
the world may never know
Viruses are grown in tissue media like aminiotic membrane of egg and other tissue media where they usually produce infection.
Viruses do not grow because they are not alive. They can reproduce, but only inside a host cell.
The jelly like substance is agar and is produced from seaweed. In the laboratory, the agar is placed in a Petri Dish.
you can grow a virus it but it need a cell to reproduce and spread
Viruses can only live in living organisms (viruses themselves are not actually living). They might infect cells in our body, such as throat cells (infection of throat cells causes sore throat).
If you mean micro organisms than you want agar plates. This is a substance high in general nutrition that is used to grow microorganisms in a petri dish.
Interferon
no. . . Because parasites and viruses can only grow on living matters... There may be saprophytes and bacteria growing in your food. . . Even parasites and viruses can be there but can not grow. .
No, only a host cell to reproduce. (Viruses do not grow)
Culture
"Crank" is slang for methamphetamine. It is not grown, it is manufactured in a laboratory.