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Cell Structure and Microscopy - Coggle Diagram
Cell Structure and Microscopy
Cells Basic Unit Of Life
Discovery
Schleiden (1838): All Plants are made of cells
Schwann (1839): All Animals Made of Cells
Robert Hooke (1665): Cork Cells
All cells come from existing cells
Why cells?
Chemistry of Life separated from enivronment
Surrounded by partially permeable membrane
Two types of cells
Eukaryotic Cell
Prokaryotic Cell
Cell Theory
Cell Biology and Microscopy
Microscope types
Units of Measurement
Magnification and Resolution
Microscope Operation
Eukaryotic Cell Structure
Common to Animal and Plant Cell
Animal Cell Specific Structures
Plant Cell Specific Structures
Cilia and Flagella
ATP (Adenosine Triphosphate
Prokaryotic Cell Structure (Bacteria)
Much simpler than eukaryotic
Generally 1-5μm diameter
No membrane bound nucleus
70S Ribosomes (Smaller than eyukaryotes)
Very few types of cell organelle
Key structures
Sometimes present structures
Cell division by binary fission
Some carry out nitrogen fixation
Viruses
Tiny particles (20-300nm), much smaller than bacteria
Boundary between living and non-living
No cell structure
Always parasitic
Often symmetrical shape
Lynn Margulis & Endosymbiont Theory
Challenged traditional Darwinian Evolution
Proposed new organisms for symbiotic partnership
Endosymbiosis: one organism engulfs another, survives,benefits host
Key Examples
Mitochondria were originally free-living bacteria
Chloroplasts were originally photosynthetic blue-green bacteria
Evidence
Mitochondria/Chloroplasts contains 70S Ribosomes
Mitochondria Cholroplasts contain small cilcular DNA
Mito/Cholor can no longer live independently
Major driving cause evolutionary change