The light dependent reaction uses energy instead of sunlight to produce energy-rich compounds like ATP
Yes, mitosis does indeed stop. There is a limited amount of times that cells can divide. For example, muscle and nerve cells. In fact, nerve cells stop at about the time we are born.
The cellular break down the food so it can get energy to use and throw away the not important one <span />
Instead of seeds they produce spores. My names Gary Winthorpe and you can ask me any questions you want ;)