1.Why did you use a pencil to mark the paper and not a pen? 2.Why do you have to use a different capillary tube for each sample? 3.Why is it very important in the amino acid chromatogram not to touch the paper with your fingers or hands? 4.If two samples have identical Rf values does this mean that they are necessarily identical molecules? Explain 5.What is your unknown? How do you know?

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.

c. the initial amount of money placed in the savings account