Answer: Cells
Explanation:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs.
Mitosis is a process of cell duplication during which one cell gives rise to two genetically identical daughter cells.
meiosis a division of germ cells involving 2 fussions of the nucleus and giving rise to four gamates, each possessing half the number of chromosomes of the origional cell.
<span>D. Atmosphere is the answer to this question
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