Because they supply much energy to the food by preparing their own food because the above one can't prepare it own their own
I think is D i hope this helps
Nucleic acids also typically contain phosphorous, and nitrogen plays an important structural role in nucleic and proteins. The proteins, being made up a diverse set of amino acids, have, in addition to carbon, hydrogen, oxygen, and nitrogen, the elements sulfur and selenium.
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<u>Genes </u>are units of <u>inheritance </u>that are found on <u>chromosomes</u>
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I think this is the answer :
animal cell: medium
plant cell: largest
bacteria cell: smallest