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Guidelines for Classifying Specimens and Scoring Microscopy Drawings

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13 diapositives · 282 Views · Jul 21, 2014

This document outlines the assessment criteria for classifying plant and animal specimens, along with specifics for scoring microscopy drawings. Key aspects include the necessity of flow charts with stamps for full points, requirements for labeling pictures and magnifications, and detailed characteristics for identifying plant features like chloroplasts and cell walls. Additional points are available for well-executed drawings, while deductions apply for lack of color or stamps. Understanding these criteria is crucial for successful observation and classification of microscopic life.

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  1. Page 98 • 2 points for having a flow chart with a stamp. • (no stamp = no points) • Late stamp is OK

  2. Page 99 • ½ point for having each picture titled. • ½ point for having each magnification written in. • 1 point per drawing • Deduct ½ point if it is not in color

  3. Page 100-101 • 1. What observable characteristics can be used as evidence for classifying a specimen as a plant? In other words, what structures or features do you see that tell you the specimen you observed (elodea) was a plant? • Chloroplasts and/or cell wall (½ pt)

  4. 2. Are the chloroplasts you observed moving or stationary? • Stationary (½pt)

  5. 3. Inside the mouth, cheek cells are joined together in a sheet. Why are they scattered here? • These cells were swabbed and removed. (½pt)

  6. 4. How are the animal cells different from the plant cells you observed (list at least three differences)? • They contain no chloroplasts, they don’t have a cell wall, they needed to be stained, they were scattered, etc. (½pt)

  7. 5. What is the relationship between plant cell structure and the ability of plants to stand upright? • Plant cells contain cell walls and a large central vacuole that helps them stay rigid ( ½ point)

  8. 6. Cheek cells do not move on their own, so you will not find two organelles that function for cell movement. Name these organelles. • Cilia & flagella ( ½ pt)

  9. 7. Were the cells you observed eukaryotic or prokaryotic? How do you know? • Eukaryotic. They had a nucleus and were plant and animal cells. We were able to see them under the microscope ( ½ pt)

  10. 8. Is the nucleus always found in the center of the cell? • No. ( ½ pt)

  11. 9. Why are stains such as methylene blue used when observing certain cells under the microscope? • Some cells don’t have pigments or color and require a stain to highlight certain features. Staining helps differentiate between different parts of the cell (1 pt)

  12. 10. (1 pt)

  13. Cell Organelle Drawings • Pages 81, 83, 85 • Each page above is worth 2 points. • Subtract 1 point per page with no color • Subtract 1 point per page with no stamp.