Which of following statements are true? Check all that apply.

Human cells are eukaryotic, but the body also hosts prokaryotes such as bacteria. So the body contains both eukaryotic and prokaryotic cells, making C true; this does not mean human cells themselves can be prokaryotic, so B is false. Many prokaryotes living in the body are harmless commensals with no noticeable positive or negative effect, making D true.

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