Which of the following causes a tumor to form

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

What are some natural processes that represent physical and chemical changes?