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Cells Makeup Lab Name _________________________________________ Pd _____ Purpose The purpose of this lab is to examine the basic structure of plant and animal cells. Background In this lab, you will search for the following images online: 1) cells from an onion bulb. 2) cells from a living plant, Elodea. Elodea is a flowering water plant found submerged in water. 3) animal cells from a familiar source: the cells lining the inside of your mouth.( cheek cells) Procedure Onion Cells: 1. Identify the parts of the onion cells. Find the nucleus, nucleolus, cytoplasm, and cell wall. 2. Draw several onion cells as they appear under low power (4x). 3. Draw several onion cells as they appear under high power (40x). Label the following parts: nucleus, nucleolus, cytoplasm, and cell wall. Elodea 1. Identify the cells wall and chloroplasts. 2. Draw several Elodea cells as they appear under low power (4x). 3. Draw several onion cells as they appear under high power (40x). Label the following parts: chloroplasts, cytoplasm, and cell wall. Animal Cells 1. Try to identify the parts of the cell. Look for the nucleus, cytoplasm, and cell membrane. 2. Draw several cheek cells as they appear under low power (4x) 3. Draw several cheek cells as they appear under high power (40x). Label the following parts: nucleus, cytoplasm, and cell membrane. Observations and Data :Drawings of Cells Onion Cells: low power (4x) Onion Cells: high power (40x) Elodea Cells: low power (4x) Elodea Cells: high power (40x) Cheek Cells: low power (4x) Cheek Cells: high power (40x) Analysis 1. Describe the shape of the a. Onion cell ___________________________________________________________________ b. Elodea cell ___________________________________________________________________ c. Cheek cell ___________________________________________________________________ 2. Are the cells regular or irregular in shape? a. Onion cell _________________________ c. Cheek cell __________________________ b. Elodea cell ________________________ 3. What are the factors that might determine cell shape and size? _________________________________ ______________________________________________________________________________________ 4. What are the similarities between the onion cell and Elodea cell? ________________________________ ______________________________________________________________________________________ 5. What are the differences between the onion cell and Elodea cell? _______________________________ ______________________________________________________________________________________ 6. Compare and contrast the onion and cheek cell. _____________________________________________ ______________________________________________________________________________________ 7. Why was it was necessary to stain the cheek cell? ___________________________________________ ______________________________________________________________________________________ 8. Why didn’t we have to stain the Elodea cell? ________________________________________________ 9. What structures are found in plant cells but not animal cells? ___________________________________ 10. What features make plant and animal cells different from bacteria? _____________________________ ______________________________________________________________________________________ Conclusion Draw a picture of an animal and plant cell and show (FOCUS) on the differences between them. Should be in color and include the main differences between the cells.
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