1 facts about living things. 2 what are the main characteristics of organisms? 1.made of cells...
TRANSCRIPT
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Facts About Facts About Living ThingsLiving Things
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What Are the Main What Are the Main Characteristics of Characteristics of
organisms?organisms?1. Made of CELLS2. REPRODUCE 3. Have a UNIVERSAL GENETIC CODE 4. GROW and DEVELOP 5. Require ENERGY (food) and EXCHANGE
materials with surroundings (water, wastes, gases)
6. Respond to their ENVIRONMENT7. Maintain a STABLE ENVIRONMENT
-Homeostasis
8. Living things CHANGE OVER TIME.
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Living things are organized…
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LEVELS OF ORGANIZATIONLEVELS OF ORGANIZATION
Nonliving Levels:
1.ATOM (element)
2.MOLECULE (compounds like
carbohydrates & proteins)
3.ORGANELLES (nucleus, ER, Golgi
…)
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LEVELS OF ORGANIZATIONLEVELS OF ORGANIZATION
Living Levels:
1.CELL (makes up ALL organisms)
2.TISSUE (cells working together
3.ORGAN (heart, brain, stomach …)
4.ORGAN SYSTEMS (respiratory, circulatory
…)
5.ORGANISM
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Number of CellsNumber of CellsAlthough ALL living things are
made of cells, organisms may be:
• Unicellular – composed of one cell
• Multicellular- composed of many cells that may organize into tissues, etc.
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Multicellular OrganismsMulticellular Organisms• Cells in multicellular organisms
often specialize (take on different shapes & functions)
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Cell SpecializationCell Specialization
•Cells in a multi-cellular organism become specialized by turning different genes on and off
•This is known as DIFFERENTIATION
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Specialized Animal CellsMuscle cells Red blood cells
Cheek cells
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Specialized Plant cells
Xylem cellsPollen
Guard Cells
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Organization Organization Levels of LifeLevels of Life
Atoms to OrganismsAtoms to Organisms
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ATOMS MOLECULES ORGANELLES
Nonliving LevelsNonliving Levels
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CELLS – life starts here
TISSUES – Similar cells working together
Living LevelsLiving Levels
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ORGANSORGAN SYSTEMS ORGANISM
Different tissuesworking together
Different organsworking together
More Living LevelsMore Living Levels
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To do…1. Please read pages 15 -17, and answer
questions # 1, 4, 5 and 6 on page 22
2. Please read pages 190-193. While reading, complete the accompanying worksheet.