To absorb nutrients and help us grow and to get rid of harmful bacteria
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Populations have variation in traits due to random mutation, crossing over and environmental conditions.
Answer:
The shortcomings or drawbacks of cell theory are: Viruses are considered as acellular entities or organisms that do not have cell machinery, yet they are taken into account as organisms in this cell theory. Matthias Schleiden and Theodor Schwann did not know the mechanism of the cell.
Explanation: