Finishing up 4-2: Intro to Cells

Prokaryotes vs. Eukaryotes DNA membrane bound ribosomes Similar metabolism Everything BUT bacteria! Membrane-Bound Nucleus Organelles ~10 x larger Mitosis BACTERIA!! Free Floating DNA No organelles Tiny! more primitive

Prokaryotic Cell

Eukaryotic Cell

Organization of Cells ColoniesColonies –Group of cells, but not a multicellular org. –Cells don’t depend on each other True MulticellularityTrue Multicellularity –Heirarchy: –Atoms, molecules, organelles, cells, tissues, organs, organ systems, organism!

Heirarchy of Organization

REVIEW What are the three basic parts of all cells?What are the three basic parts of all cells? –Plasma membrane, cytoplasm, Control Center What is the factor that limits cell size?What is the factor that limits cell size? –Ratio b/w volume and surface area. Explain how the volume to surface area ratio limits cell size.Explain how the volume to surface area ratio limits cell size. –If the vol. is too great the insufficient surface area cannot move materials efficiently across the cell membrane. Differences between pro & eukaryotic cells??

p. 76

MICROSCOPE LAB! Parts of the microscope 1 st –pg 1070 Prepared Slide Wet Mount of Elodea

4-3: Cell Organelles & Features

What cell type has lots of organelles?? Has lots of membrane systems & membrane-bound organelles, too!Has lots of membrane systems & membrane-bound organelles, too!

Plasma Membrane

p. 85 #3-6