7. this was a small example to learn concepts, and it is much smaller than real genes. in a real gene, the exons average about 150 bases each and are almost always less than 400. introns can be highly variable in length but may be hundreds of bases. a small gene might have 4,500 bases and many exons and introns. remember that in this activity, each square was used to represent one base. one or two exons or introns might fill up a sheet of graph paper. how many pages would you need to represent a small gene of 4,500 bases? (figure out or count how many squares are on one sheet of graph paper. then figure out how many sheets would have 4,500 squares.)

Okay, ill will try to help the best I can from what I read. So, If the grid you are using is 30x45(1,350 squares) and the small gene is about 4,500 bases, I would say you need at least 4 pages.

1350x3=4,050 bases

1,350x 4= 5,400 bases

It would be good to have the extra room to just in case you need to add anything else. I say this because it sounds like there could be more added. So I hope I helped in some way, and please correct me if I'm wrong.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above