Week 13, Day One. HW # 43 - Compare the L (in your KWL) to what is said on pgs. 84 & 85 of your text. Add any additional information that you feel is important. Perform your Cell Theory Rap for a friend/parent/sibling/pet. Warm up
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HW # 43- Compare the L (in your KWL) to what is said on pgs. 84 & 85 of your text. Add any additional information that you feel is important.
Perform your Cell Theory Rap for a friend/parent/sibling/pet.
(collect last week’s warm up & parent letter)
Where do cells come from? How do you know?
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There are 3 parts to cell theory.
1.All living things are made of cells.
2. The cell is the basic structural and functional unit of life.
3. All cells come from pre-existing cells.
yeast cells dividing
All plants are made of cells!
1. Schleiden (circa 1838)
Onion skin cells
All animals are made of cells!
Human red blood cells
All cells come from pre-existing cells!
Smallest free-living cell =
Size = 0.2 to 0.3 µm
Size=1-5 mm in length.
common name =
Chaos diffluens, is an amoeba closely related to the giantamoebae
They are microscopic!
Use a microscope!
2. Electron microscope
Small size – allows materials to move via diffusion
1. Cell Membrane – selectively/differentially permeable (lets some things in and out)
2.Cytoplasm – semi-fluid material in which cell organelles float
3. Nucleic acid containing genetic code :
Which nucleic acid?
4. Cytoskeleton – proteins that support the cell
– make proteins
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