Answer:
The presence of the nucleus!
Explanation:
Since it is a Bacteria, they do not have a nuclei. But eukaryotes do.
Both can reproduce(tip: Bacteria is asexual meaning it can reproduce by itself), has a membrane and have ribosomes
The energy originated from the animal when it was alive
"With its systematic approach, the scientific method has proven useful in shaping sociological studies. The scientific method provides a systematic, organized series of steps<span> that help ensure objectivity and consistency in exploring a social problem. They provide the means for accuracy, reliability, and validity."
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https://courses.lumenlearning.com/alamo-sociology/chapter/the-scientific-method/
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