Skin cells reproduce rapidly to heal a cut or scrape. How do mitochondria help the cells carry out this task?
by providing the blueprint for new cells
by allowing useful substances to get inside the cells
by synthesizing the proteins that make up the new cells
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by making energy available for the cells to use

Compare the lunar phase of the waning crescent to the waxing gibbous. the waning crescent is increasing in illumination and the waxing gibbous is decreasing in illumination. the waning crescent is decreasing in illumination and the waxing gibbous is increasing in illumination. the waning crescent is more than half illuminated and the waxing gibbous is less than half illuminated. the waning crescent is more than half illuminated and the waxing gibbous is more than half illuminated.