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depends upon the stage of life

in the embryo, apoptosis, or programmed cell death, occurs as vestigial formations such as a tail or the webbing between fingers and toes develops in to the normal structures such as fingers...or not having a tail. withhout programmed cell death here the structures would not be defined at birth.

a different kind of cell life/ death process is seen in cancerous cells (the go-to example of the necessity of cell death) when transcriptional regulation of the normal processes of the cell go haywire and the cell does not respond to signals from the endocrine or immune system to either die or not grow as fast. if cells do not kill themselves off in these situations, they proliferate and cause a single cancerous cell to grow into a tumor or go metastatic.

hope this helps

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14y ago

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