Answer:
nucleus
Explanation:
it holds information needed to regulate most of the cell functions
Allow the water to evaporate, it will leave the salt, it being a solid substance, behind.
A chemical reaction is a reaction that forms a new substance and it is also a reaction that s permanent ( you cannot reverse)
Air is a mixture of gases like nitrogen, oxygen and traces of other gases like argon and many others. To improve this experiment, the mixture should be separated into its components to avoid contamination. In order to achieve this, you can use the cryogenic process, which is a distillation process at very low temperatures. In this case, you can use pure nitrogen or pure oxygen for your experiment.