- Use green to shade where photosynthesis occurs - Use yellow to show light from the sun - Use blue arrows to show the path of water through the tree/environment. - Use black arrows to show where carbon dioxide enters the plant and where it goes. - Use orange arrows to show where oxygen is made and where it goes. - Use red arrows to show where glucose/sugar is made and where it is transported and draw what the glucose can be used to make. - Use purple and purple stripes to shade where cellular respiration occurs..