He is correct because as you can see from the picture, the outer side of the cell has a cell wall. Only plant cells have a cell wall. In addition, the cell is box like opposed to an animal cell which is not box like. Plant cells can go through a process called photosynthesis
hmm Id suggest you google what a plant cell looks like and how to determine it on google this may or may not be helpful but its all i got good luck on gettin it in on time
The water would be warmer 200 miles north of the equator than it would be 2000 north of the equator, because the closer you are to the equator the more sun light you get.