Hannum

Rachel Hannum's Page

Rachel great job1 A. The chloroplasts were moving. This was so cool! Especially the chloroplasts in the middle stream were moving. B. Yes the chloroplasts seem to be following each other. Each individual cell has a different direction but each cell has its specific direction. All of them move together in a pretty fast pace but at the same fast pace. C. Yes they have structures for locomotio n. Note cell walls are the lines not the circles Potato A. These cells where hard to observe because of their grey color. They tended to blend together with their own cytoplasm and looked more like air bubbles then cells to me. The iodine really helped to show the starch grains though. B. No I did not find that a potato has chloroplasts. C. Iodine is a brown-reddish color when leaving the bottle but when it comes in contact with the potato it turns black. D. Since the potato does turn black when it comes in contact with the iodine it does in fact have starch in it. Everything turns black except for the cytoplasm. E. Potatoes do not have chloroplasts because they would not use it. Chloroplasts are used to take sunshine and make food via photosynthesis. Since potatoes grow underground and do not use the sun for food they do not need the chloroplasts. 

Onion A. No the onion turned more of a yellow color then a black. Meaning an onion does not have starch B. Yes my hypothesis from the potato does apply to the onion. You do not see chloroplasts in the onion and onions are also made underground meaning they do not need to go through photosynthesis, so there is not need for the chloroplasts.



Tomato Skin A. No the tomato skin is only one cell thick otherwise you would see a whole lot of overlapping messy cells. Whereas you see very well defined shapes. B. No not all the cells are the same size and shape but they all fit together like a puzzle. Some have a square shape whereas some have more of a hexagon shape to them but they all go off of each others sides to make said shapes. C. I see some red pigments in the tomato skin cells. D. Chromoplasts is the technical term for the plastid that makes the tomatoe red. E. The structure is well defined yet shaped to the surrounding cell walls they seem to work off of each other.

Tomato Pulp A. The color of the tomato pulp is a brown/tan color. B. The shape is very oval with a tapered end to it. C. The cell wall of the pulp is a lot thinner and less defined then that of the tomato skin. D. The cell wall's job is to support the cell and hold shape. It makes sense that the skin would be more defined because it has to hold the pulp in. Without the skin the pulp doesnt stay together as well. So it makes sense that the cell walls for the pulp are smaller then that of the tomato skin. E. You do not see as much chromoplasts in the tomato pulp as you do the tomato skin. The chromoplasts are found less and more clumped together in the pulp then the skin. In the skin the chromoplasts are everywhere it all looks red. F. The skin has more chromoplasts then the pulp but they look similar in color when your looking at the whole tomato because when you are looking at the pulp you are looking at layer upon layer upon layer of cells of pulp whereas your looking at one cell thick of skin.

Beet Pulp A. The cell walls are curved and small. B. There is pigment present. The specimen looks purple/red. C. Judging from my 100X picture I can say that the pigments are dispersed throughout. They are not limited to the plastids. D. It could be they both have a certain red tint to them. The difference is that the tomato is contained within the plastids and the beet is spread throughout.  

Human Cheek Cells A. No the cells do not have a cell wall because they are my cells not a plant's cells. They have a cell membrane. B. They all have the basic "fried egg" shape even though some of them might be slightly off they all look pretty similar. C. The cells have a very clear nucleus (the "dippy" part of the "fried egg"). Since I eat my food and do not get it from the sun via photosynthesis my cells do not have chloroplasts. These cells might have a small vacuole but it is not visible in these photos.

Conclusions 1. Both plant and animal cells have the following: Nucleus Cell Membrane Vacuole Cytoplasm 2. The main structural differences I noticed are as follows: Plants have a cell wall and animals have a cell membrane Because of this difference I noticed that animal cells are more polymorphic whereas plant cells hold shape and are very monomorphic. 3. Cell shape Location of pigments Where chloroplasts are located (if they are present) 4. The purpose is to prove if they have starch and in some cases so that we could get a clearer picture of said cell.

 Teacher note Photos are good. I would have enlarged them a little so that I could see labeling better. Even though I said that you did not need to write out the questions, while reading your analysis I should know what you are talking about. If I have to back up and read the question, it is not as effective. grade: 92/100