Which of the following statements are true of cellular reproduction in multicellular organisms?
i. cells reproduce through the process of binary fission.
ii. cells reproduce through the process of mitosis.
iii. cells are produced through spontaneous generation.
iv. new cells are produced by existing cells.

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what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.