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Microscope Lab - Observing plant and animal Cells Purpose: Observe differences and similarities between plant and animal cells Procedure: 1. Create wet mount of onion skin, stain the specimen, and draw onion cells under high power. 2. Do the same with your cheek cells. Rub toothpick on the inside of your cheek and rotate it in the drop of the stain on your slide to wash off the cheek cells. Cover with coverslip and draw under high power. 3. Observe prepared slides of frog and human blood and draw them under high power. 4. Label cell membrane, cytoplasm, nucleus, and cell wall on each drawing if present. Drawings: Onion Cells Cheek Cells Microscope Lab - Observing plant and animal Cells Frog Blood Human Blood Questions: 1. Compare and contrast animal and plant cell shape? 2. Why do scientists use stains to study cells? 3. Many cheek cells were folded over. What does it tell you about thickness of these epithelial cells? 4. Why there were no chloroplasts in the onion cells? Microscope Lab - Observing plant and animal Cells Grading Rubric: Drawings 4 Well drawn cells, all labels correct. 3 Well drawn cells, one label incorrect, or missing. 2 Unclear drawing, labels missing or incorrect. 1 Very confusing drawing and labels. Correct complete answer. Partially correct or incomplete answer Incorrect answer but some thought showing No answer or no effort showing. Onion Cells Cheek Cells Frog Blood Human Blood Questions Question 1 Question 2 Question 3 Question 4 Total: ________ / 32