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1. The object in the picture is a living organism, it is multicellular, and it is a plant. 2. The evidence that supports our claim are that the cells are visible, more than one cell is visible, cell walls are visible, and chloroplasts are visible. 3. Evidence of a eurkaryotic cell are that the cell has a nucleus, and that the cell has membrane bound organelles. 4. This cell is an animal cell, because it does not have any chloroplasts or a cell wall. Page 38 Nucleus Cell Type: Eukaryotic cells (plants and animals) Quantity: One per cell Function: Contains genetic information that gives directions to make proteins and other materials the cell needs. Cell Membrane Cell Type: All Cells (prokaryotic and eukaryotic) Quantity: One per cell Function: Surrounds and protects the cell and controls what materials go in and out Chloroplasts Cell Type: Plant cells only Quantity: Number varies, usually more than 1 Function: Captures energy from sunlight and changes it into food for storage or energy for the cell to use Mitochondrion Cell Type: Eukaryotic cells (plants and animals) Quantity: Number varies, usually more than 1 Function: Converts energy stored in food into a form that cells can use Page 39 6. Chloroplasts and cell walls are observed to support the conclusion that these are plant cells. 7. It would not be possible to see the cell structure without magnification. 8. At a higher magnification, it might only be possible to see one or two of the actual cells; however, this level of magnification would provide a better view of the nucleus and chloroplasts. 9. At a lower level of magnification, the viewer could see more of the cell, like the cell wall, but fewer details of the cell, such as smaller organelles. 10. Microscopes allow scientists to see the relationship between cells and organisms by observing how different organisms have cells with different organelles. Page 40 11. The illustration of cell division demonstrates the "all cells come from existing cells" part of cell theory. 12. No, because cell division cannot be seen with the unaided human eye. 13. 3D models show an object or process as it really is, in three dimensions. This means scientists are better able to explain the relationships among the parts of an object or its process. However, these models usually cost more than 2D models, and their complexity may confused students approaching a concept for the first time. |
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