Reviewing Content:
1.D
2.C
3.B
4.C
5.C
6.A
7.B
8.B
9.A
10.A
Understanding Concepts:
11. During cell division, a cell divides into two new daughter cells.
12.When a cell is small, the information stored in its DNA is able to meet all of the cell's needs. But if a cell were to grow without limit, an "information crisis" would occur.
13. Cell volume is the amount of material inside the cell. Surface area is the total area of the cell's membrane. Ration of surface area to volume is the surface area divided by the volume.
14. A cell's ration of surface area to volume decreases as it grows larger. This means that the area available for diffusion also decreases. Thus is a cell grows too large, it is unable to take in all needed materials and expel all its wastes. These problems impose limits on the growth of a cell.
15. Well before cell division, each chromosome is replicated. At the beginning of cell division, each chromosome consists of two identical sister chromatids.
16. Together, interphase and cell division make up the cell cycle.
Tuesday, March 10, 2009
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