Cells regulate uptake nutrients and messenger cargos hope this answered the question
what do the flasks contain?
here is the answer of this qquestion
an electrically charged particle is your answer :)
Answer: burning processes, such as backyard burning and commercial or municipal waste incineration.
the use of fuels, such as wood, coal, or oil.
natural phenomena, such as volcanic activity and forest fires.
industrial processes, such as chlorine bleaching of paper pulp and smelting.
Explanation:
Hope I gave you the answer you are looking for :) LMK