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Bio Notes Chapter 1 - Chapter 1-An Introduction to Biology...

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Both Prokaryotic Similar Biochem Mechanisms 4 kingdoms Very Ancient Prokaryotes Bacteria Archea Origin Of life Eukarya Chapter 1-An Introduction to Biology A) Biology – the study of life bios – life precise def. difficult logos – study of (Brooker fig. 1.2 7 characteristics) B) Hierarchy of Organization Unit Alive? 1) Atoms No 2) Molecules No 3) Macro Mol. No Complexes C) Cells – have “life” Life “emerges” at the cellular level of organization
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New properties emerge at the molecular level Life- 3 “Domains” .. cell structure Biochemical mechanisms Cell structure prokaryotic Eukaryotic Biochemical mechanisms- ex: the enzymes involved in DNA replication (see figs 1.8 and 1.9) Hierarchy (cont.) 3. Cells (cardiac cell) 4. Tissues (cardiac cells ) 5) organs (heart) Organ system (circulatory system) 6) Organism (many systems) 7) population 8) community 9) ecosystem c)Taxonomic Hierarchy
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D omain Kingdom Phylum Class Order Family Genus Species (see fig 1.10) 2 Reasons why we use taxonomic Hierarchy 1)
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