They tell your skin when it needs help with something.
Answer: telophase
explainion: An overview of the cell cycle and mitosis: during prophase the chromosomes condense, during metaphase the chromosomes line up, during anaphase the sister chromatids are pulled to opposite sides of the cell, and during telophase the nuclear envelope forms
It regulates on/off like a light switch
The answer is ATP molecules being produced, this happens in light and dark.
All of the other options are either directly related to light/photosynthesis or are needed to complete it.
When a ball goes up in the air when it pauses to come back down that is the potential energy.
