Answer:
producer rely for photosynthesis and consumers for vision and growth
It is called a contusion. Hope this helps.
The difference between the two students that we know of is that they used a different meter stick. So the difference would be best attributed to the different tools they used.
Note, this is quite a huge difference. It's likely that one of the sticks, or both, are quite defect.
It would be a young puppy learns to beg for food by watching a older dog
It would be Carbon Dioxide.
