Name _______________________________ Date ____________________ Per. _____                           Observing Cells LabIns...
Name _______________________________ Date ____________________ Per. _____                          Observing Cells Labobse...
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Onion and cheek cell lab

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Transcript of "Onion and cheek cell lab"

  1. 1. Name _______________________________ Date ____________________ Per. _____ Observing Cells LabInstructions: Create a lab report beginning on page 70 of your INB. The title of this lab isObserving Cells Lab.IntroductionAfter reading through the lab procedures in parts A and B, write a thorough introductionexplaining the purpose of this lab. Also use your knowledge about plant and animal cellsto add details to the introduction. Your introduction should be at least 7 sentences.Materials:OnionIodine stainSlide and cover slipDropperToothpickMicroscopePart A) ONION CELL LABMethod:1. Obtain a thin slice of onion from the teacher.2. Put a drop of iodine stain on a slide. - Be careful, stains can ruin clothing and other materials.3. Place onion slice in iodine stain on the slide. The slice should not be wrinkled orfolded.4. Put a cover slip over the stain.5. Observe under the microscope under low, medium and high powers.6. Draw your observations on your paper for low, medium, and high powers. a. Label the cell membrane, nucleus, cytoplasm, and any other organelles youobserve (i.e. vacuoles).7. Place your used materials in the designated area.Part B) CHEEK CELL LABMethod:1. Obtain a clean slide and cover slip.2. Put a drop of iodine stain on a slide. - Be careful, stains can ruin clothing and other materials.3. Gently rub the end of a toothpick on the inside of your mouth along the cheek. - Be careful! Do not gouge out your cheek.4. Stir the toothpick in the iodine stain.5. Immediately, throw the toothpick away.6. Put a cover slip over the stain.7. Observe under the microscope under low, medium and high powers.8. Draw your observations on your paper for low, medium, and high powers. a. Label the cell membrane, nucleus, cytoplasm, and any other organelles you
  2. 2. Name _______________________________ Date ____________________ Per. _____ Observing Cells Labobserve (i.e. vacuoles).9. Place your used materials in the designated area.Data TableCreate an appropriate data table under the procedures for parts A and B.Analysis and ConclusionSave room to write a conclusion that describes what you did in the lab and what youdiscovered.

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