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- Why do you think apoptosis occurs by a different mechanism from the cell death that occurs in necrosis? What might be the consequences if apoptosis were not achieved in such a neat and orderly fashion, whereby the cell destroys itself fron within and avoids leakage of its contents into the extracellular space?Why is apoptosis preferable to necrosis?How are apoptosis and necrosis similar? How do they differ?