Which of the following is not part of the cell theory?

a. every living thing is composed of cells.
b. cells come from preexisting cells.
c. cells are the basic unit and structure of all living things.
d. every cells have a nucleus that contains genetic material.

D. There are three parts of the cell theory and this one is never stated.

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The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.