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Please answer the following questions (attached).

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LAB 4-A

1- What do you think is the function of the appendages extending from the nerve cells?
2- What three organelles (or structures) can you view in the elodea leaf cells, but not in the mammalian nerve cells?
3- Does Spirostomum have a cell wall? How do you know?
4- How do nerve cells, Elodea leaf cells, and spirostomum compare in size?
5- Even before examining eukaryotic versus prokaryotic cell structure, would you predict that the mammalian nerve cells, Elodea leaf cells, and the protozoan Spirostomum are eukaryotic or prokaryotic cells? Why?

LAB 4-B

1- Which cells are the smallest-bacteria. Elodea or Spirostomum?
2- Based on size, which of these cells is the simplest in structure?
3- Why is the plasma membrane of the various cell types not visible with your microscope?
4- Are nuclei visible in the bacterium lactobacillus and the cyanobacterium anabaena?
5- Knowing that Anabaena is photosynthetic, do you think that the color when observed under magnification is due to the presence of chloroplates? Explain?

LAB 4-C

1- Since onion cells and elodea leaf cells are both plant cells, why is the nucleus visible only in the onion cells?
2- Do you agree or disagree with the statemet: All plant cells contain chloroplast. Why or why not?
3- What organelles (or structures) do onion epidermal cells possess that are NOT found in human cheek epithelial cells?
4- What organelle (or structure) do you see in the onion epidermal cell that is also visible in the human cheek epithelial cell?

LAB 4-F

1- What is similar about the functions of RER,SER, and Golgi complex? How might they interact?
2- Which organelles are exclusive to plants? To animals? How does this affect the functions of these organisms?
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