Genetic variation is the answer to ur question
<span>Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Bacteria are an example of prokaryotes. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.</span>
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Well, I think the answer would be, Both biomass and coal energies are inexpensive, but they release greenhouse gases.</span>
