7.1 Life is Cellular The Discovery of the Cell

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Presentation transcript:

7.1 Life is Cellular The Discovery of the Cell Key Q: What is the cell therory? Early Microscopes-Robert Hooke (cork)- Van Leeuwenhoek(pond water) Scientists: Schleiden (plants), Schwann(animals) & Virchow(new from existing) Key A:The Cell Theory All living have cells Basic structure & function New produced from existing

Exploring the Cell-The basic unit of life. Key Q: How do microscopes work? Key A: Use lenses to magnify the image of an object by focusing light or electrons. Microscope Types Light Microscope Electron Microscopes TEM (Transmission Electron)-beams electrons pass through. SEM (Scanning Electron)-electrons pass over.

Prokaryotes(Pro, No nucleus) Eukaryotes Key Q: How are prokaryotic & eukaryotic cells different? Prokaryotes(Pro, No nucleus) Eukaryotes No nucleus to separate the genetic material from the rest of the cell. Yes nucleus to separate the genetic material from the rest of the cell.

Cell Membrane- thin flexible barrier that surrounds all cells; regulates what enters & leaves. Nucleus-controls the cell; contains DNA. Key A:Prokaryotic cells do not separate their genetic material within a nucleus. Key A: Eukaryotic cell, the nucleus separates the genetic material from the rest of the cell.

WB pgs 98-100. Skip #14

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