Who or what

btw this is 6th grade science and this is not a true or false question

true

explanation:

this is actual the cell theory, therefore it must be truein biology, cell theory is the historic scientific theory living organisms are made up of cellsthey are the basic structural/organizational unit of all organismsall cells come from pre-existing cells.

What is your question then

You should never redesign your experiment. try and see what in your experiment you made a mistake on or try and test your experimemt with somebody else. see if they get the right results.