Cells Diversity, Size, Basic parts And Prokaryotes vs. Eukaryotes.
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Transcript of Cells Diversity, Size, Basic parts And Prokaryotes vs. Eukaryotes.
![Page 1: Cells Diversity, Size, Basic parts And Prokaryotes vs. Eukaryotes.](https://reader033.fdocuments.us/reader033/viewer/2022061615/5a4d1af47f8b9ab059980641/html5/thumbnails/1.jpg)
Cells
Diversity, Size, Basic parts And
Prokaryotes vs. Eukaryotes
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Cellular OrganizationLife is Highly OrganizedLiving things are organized in a “Hierarchical” manner – meaning one level is integrated into the next higher level, increasing in complexity
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Explain: Cell Diversity
Cells within the same organism show Enormous Diversity in:
1. Size2. Shape3. Internal Organization
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1. Cell SizeFemale Egg - largest cell in the human body; seen without the aid of a microscope about the size of a grain of salt
Most cells are visible only with a microscope.
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Cells are small for 2 Reasons
Reason 1:Limited in size by the RATIO between their Outer Surface Area and Their Volume. A small cell has more SURFACE AREA than a large cell for a GIVEN VOLUME OF CYTOPLASM.
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Why cells are small As a cell grows
larger at some point its surface area becomes too Small to allow nutrients it needs to survive quickly enough to meet the cell's need.
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Cells are Small
Reason 2:THE CELL'S NUCLEUS (THE BRAIN) CAN ONLY CONTROL A CERTAIN AMOUNT OF LIVING, ACTIVE CYTOPLASM.
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2. Cell ShapeDiversity of form reflects a diversity of function. THE SHAPE OF A CELL DEPENDS ON ITS FUNCTION.
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What is this? Structure = function
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What is this? Structure = function
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What is this? Structure = function
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Cells size shape form
http://www.youtube.com/watch?v=SsfSyFliU0M
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3. Internal Organization
Basic Parts of a Cell All Cells have:
Plasma membraneCytoplasmControl Center
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Plasma membrane
The cells outer boundary – a barrier between the inside and outside of a cell
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Cytoplasm
The region that is within the plasma membrane - includes fluids and organelles
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Control Center
Cells carry coded information in the form of DNA .In some cells it floats freelyIn others it is surrounded by a membrane and called a nucleus
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Prokaryotic Cell
Cell membrane
Cell membrane
Cytoplasm
Cytoplasm
Nucleus
Organelles
Eukaryotic Cell
3. Internal Organization
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Two Basic Types of Cells
Prokaryotic Cell
DNA floats in cytoplasm
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Two types of cellsEukaryotic Cells
DNA bound in membrane = nucleus
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Compare and Contrast
Make a venn diagram comparing and contrasting Prokaryotes vs. EukaryotesGo to page 75
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Venn Diagram: Prokaryotic and Eukaryotic Cells
Go to diagram saved