Biology 4. What is Life? Properties of Life Reproduction.
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Transcript of Biology 4. What is Life? Properties of Life Reproduction.
Smallest Unit of Life – The CellSmallest Unit of Life – The Cell
• Prokaryotic Cells– DNA and Ribosomes– No nucleus– No membrane bound
Organelles
• Eukaryotic Cells– DNA and Ribosomes– Nucleus– Membrane bound
Organelles
Emergent PropertiesEmergent Properties
• Novel properties emerge that are not present at the level below
• Reductionism
Biology HierarchyBiology Hierarchy• Subatomic Particles• Atoms• Molecules• Organelles• Cells• Tissues• Organs• Organ Systems
• Organisms• Populations• Communities• Ecosystems• Biomes• Biosphere
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum
• Class
• Order
• Family
• Genus
• Species
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class
• Order
• Family
• Genus
• Species
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class - Aves
• Order
• Family
• Genus
• Species
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class - Aves
• Order - Falconiformes
• Family
• Genus
• Species
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class - Aves
• Order - Falconiformes
• Family - Accipitridae
• Genus
• Species
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class - Aves
• Order - Falconiformes
• Family - Accipitridae
• Genus - Haliaeetus
• Species
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class - Aves
• Order - Falconiformes
• Family - Accipitridae
• Genus - Haliaeetus
• Species - leucocephalus
Biology HierarchyBiology Hierarchy• Kingdom - Animalia
• Phylum - Chordata
• Class - Aves
• Order - Falconiformes
• Family - Accipitridae
• Genus - Haliaeetus
• Species - leucocephalus
Domain: ArchaeaDomain: Archaea
• Prokaryotic
• Extreme Conditions
• Make DNA and Proteins like eukaryotic cells
Scientific MethodScientific Method• Observation
– Senses / Lit search• Hypothesis
– Testable and Repeatable– Null hypothesis – No significant difference– Alternative hypothesis – significant difference
• Experiment– Sample Size = 30– Control, change one variable– Threshold criterion (0.05)
• Analysis– Quantitative (Statistical testing)
• Conclusion
Scientific MethodScientific Method• Observation
– Senses / Lit search• Hypothesis
– Testable and Repeatable– Null hypothesis – No significant difference– Alternative hypothesis – significant difference
• Experiment– Sample Size = 30– Control, change one variable– Threshold criterion (0.05)
• Analysis– Quantitative (Statistical testing)
• Conclusion
ProbabilityProbability in Science in Science
• Do the colors makethem harder to see?
• Is there a benefit lookinglike a poisonous species?