Plants, Animal and Bacteria cells Indicator - KCKS 10SC : Distinguish cellular structures and their function in plants, animals and bacteria. ( ▲ 3.1.2, 302, ACT ) Focused indicators - ( Content Objectives) a.Summarize the structure and function of cell organelles that perform the tasks that are needed for the cell’s survival b. Compare and contrast the organelles found in plant, animal and bacteria cells. Indicator - KCKS 10SC : Distinguish cellular structures and their function in plants, animals and bacteria. ( ▲ 3.1.2, 302, ACT ) Focused indicators - ( Content Objectives) a.Summarize the structure and function of cell organelles that perform the tasks that are needed for the cell’s survival b. Compare and contrast the organelles found in plant, animal and bacteria cells.

Focus Questions a.Summarize the structure and function of plant, animal and bacteria cells? What task do cell organelles need to perform for the cell’s survival? b.How do organelles found in plant, animal, and bacteria differ? How are organelles found in plant, animal and bacteria the same? a.Summarize the structure and function of plant, animal and bacteria cells? What task do cell organelles need to perform for the cell’s survival? b.How do organelles found in plant, animal, and bacteria differ? How are organelles found in plant, animal and bacteria the same?

Engaging Students in Cell Observation Materials needed - Microscope Slides and slid covers Onion membrane Cheek cells Bacteria cells - Yogurt (active culture)grocery store Tooth pick to scrape inside of cheek for cells Methylene Blue Materials needed - Microscope Slides and slid covers Onion membrane Cheek cells Bacteria cells - Yogurt (active culture)grocery store Tooth pick to scrape inside of cheek for cells Methylene Blue

Investigation 1 - Engaging Onion Cells What Are the Parts of the Onion Skin Cell? Onion PartFunction Looks likeSmells like

Prepare a wet Onion Slide A.You will be given a piece of onion by your teacher. B.Remove the transparent membrane from the inner surface. C.Place a flat piece of this membrane on a glass slide. D.Cover the membrane with a drop of water and a cover glass. E.Before to keep the membrane from folding or wrinkling. F.Throw the left over pieces of onion in the trash. G.Observe slide with both lower and high power magnification. A.You will be given a piece of onion by your teacher. B.Remove the transparent membrane from the inner surface. C.Place a flat piece of this membrane on a glass slide. D.Cover the membrane with a drop of water and a cover glass. E.Before to keep the membrane from folding or wrinkling. F.Throw the left over pieces of onion in the trash. G.Observe slide with both lower and high power magnification.

Onion Cell Lab Observation Sheet Name ______________ Date______________ Questions and Observations: 1.Is the skin composed of one or many cells? 2. What is the general shape of these cells? Name ______________ Date______________ Questions and Observations: 1.Is the skin composed of one or many cells? 2. What is the general shape of these cells?

Make a sketch of your onion membrane from the highest power of magnification and label the parts below. Observation 1Observation 2 Power _______Power ________ Sketch here

What do your onion skin tell you? 4. Estimate the length in microns of the cells, as seen under high power. a) Count the number of cells, laid end to end necessary to cross the diameter of the field. b) Divide the number of cells into the known field of diameter. 5.Do the cells have a cell wall? 4. Estimate the length in microns of the cells, as seen under high power. a) Count the number of cells, laid end to end necessary to cross the diameter of the field. b) Divide the number of cells into the known field of diameter. 5.Do the cells have a cell wall?

Explaining Plant Wall c.) Remove the cover slip, add a drop of methylene blue stain, and replace the cover glass on the membrane. d.)Observe the slide under both low and high power magnification, 6. Can you still see the double outer layer, that is, the cell wall? c.) Remove the cover slip, add a drop of methylene blue stain, and replace the cover glass on the membrane. d.)Observe the slide under both low and high power magnification, 6. Can you still see the double outer layer, that is, the cell wall?

Explaining Plant Cell Nucleus 7. Why was the stain added? 8. Can you see a dark, round structure inside the cell? Do all the cells have the dark, round structure? This structure is the control center of the cell called the nucleus. 7. Why was the stain added? 8. Can you see a dark, round structure inside the cell? Do all the cells have the dark, round structure? This structure is the control center of the cell called the nucleus.

Explaining Plant Cell Cytoplasm 1 0. Can you see a lightly-stained, granular area within the cells? This area is called the cytoplasm. 11. Draw a few cells of the stained onion skin as seen under both low and high power. Label structures. Stained onion skin cells Stained onion skin cells ______________X power(high) _____________X power( low) 1 0. Can you see a lightly-stained, granular area within the cells? This area is called the cytoplasm. 11. Draw a few cells of the stained onion skin as seen under both low and high power. Label structures. Stained onion skin cells Stained onion skin cells ______________X power(high) _____________X power( low)

Plant Cell Plant Cell Structure Click here for virtual tour

Comparing and Contrasting Cells el.htmhttp:// el.htm el.htmhttp:// el.htm

Compare and Contrast Plant, Animal and Bacteria Cell. er/ /animations/cell_structure/ cell_structure.htm 1.Vocabulary 2.Build a Cell 3.Assessment Compare and Contrast Plant, Animal and Bacteria Cell. er/ /animations/cell_structure/ cell_structure.htm 1.Vocabulary 2.Build a Cell 3.Assessment

Observation 1Observation 2 Power _____________Power ______________ Sketch Onion Observation Lab Sheet Printable