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Biology from smallest to biggest
- atoms
- molecules
- organelles
- cell
- tissue
- organ
- organ systems eg. nervous system
- organism
- population
- ecosystem
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Unicellular Organisms
classes and examples
- Single cell
- bacteria (monera)
- protista/ protozoans
- some fungi
- eg. euglena, amoeba
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Multicellular
- made of many cells (often specialized) *all start from stem cell
- eg. plants, animals, some fungi
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What is Differentiation and how does it work?
- specialization (has unique task)
- does so by turning certain genes on and off.
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Specialized Animal Cells
- muscle cells
- red blood cells
- cheek cells
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Specialized Plant cells
- guard cells
- xylem cells
- pollen
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Cell Info
- Typical cell is 5-50 micrometers long
- Largest single cell -the egg
- smallest single cell (human) -sperm
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Basic Cell Anatomy
All Cells...
- are contained by cell membrane
- have genetic material
- have cytoplasm with organelles
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Organelles...
- specialized structures in cells
- specific jobs, various tasks
- very small
- found in cytoplasm
- may or may not be membrane bound
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Cells are classified as Prokaryotic or Eukaryotic.
Prokaryotic is...
- simple structure
- no membrane bound nucleas or organelles
- * nucleoid region (within cell containing genetic material)
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Eukaryotic Cells...
have a membrane bound nucleas and organelles
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