Eukaryotic cells have one nucleus inside a membrane.
Prokaryotic do not have a membrane bound nucleus nor <span>mitochondria.
Also, please note the following:
Mitochondria is the powerhouse of the cell
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The answer is B) Muscle fiber aka Fascicles this is what there called in the definition.
The believe the answer is grasslands. Hope this helps. (ノ◕ヮ◕)ノ*:・゚✧