To avoid killing the test subjects before the test can begin.
The inoculating tube is cooled before use so that the organism is not killed by extensive heat.
The purpose of heating the inoculating materials before and after using them is for sterilization. They must be sterilized before to kill any bacteria already on them so that they do not contaminate anything during use, and they must be sterilized after to get off the bacteria contacted from use.
Because it is. face it
jjgg
The single atoms of helium gas are small, and has small surface area. They must be cooled to 4K before their attractive forces cause them to condense.
To avoid killing the test subjects before the test can begin.
The inoculating tube is cooled before use so that the organism is not killed by extensive heat.
The purpose of heating the inoculating materials before and after using them is for sterilization. They must be sterilized before to kill any bacteria already on them so that they do not contaminate anything during use, and they must be sterilized after to get off the bacteria contacted from use.
Because too much heat can kill bacteria. Think of pasteurised milk - the pasteurising process involves rapid heating and cooling to kill off any bacteria that might be present in the milk.
To minimise condensation on the lid of the Petri dish.
In pour plate technique the culture to be grwon is pour in melted agar medium, now when we add the diluted sample in agar plate and if the melted agar is very hot, it can lead to the damage of bacterial or fungal cell and may cause in abruption of growth, so the agar is cooled to get the optimum temp. for growth of microbial cell.
Some other inoculating instruments include loops, spreaders, swabs, and pipettes. These tools are used to transfer and spread microorganisms onto various growth media for cultivation and observation in laboratory settings.
Because it is. face it
Tar is heated so it can stick to what ever it is going on. If it was cooled it would not stick right.
cause that makes it taste better
jjgg
It is hot and must be cooled before consumption.