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Bio36_03_BasicBio - 1 2 1 3 1 2 4 5 1 2 8 9 1 Overview...

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1 Overview Register your ResponseCard RF Ch. 3: Basic Needs of Living Things – Organisms in their Environment – Environmental Factors – Matter in Living & Nonliving Systems – Matter & Energy – The Cycling of Matter in Ecosystems Organisms in their Environment • Ecology – Study of organisms & their interactions with their environment • Hierarchy – Species – Populations – Biotic communities – Ecosystems – Landscapes & biomes – Biosphere What Is a Species? Organisms are classified by relatedness – Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species – Scientific name: genus & species •E.g., Homo sapiens or Cannabis sativa Biological species concept – Based on reproductive isolation – Other species concepts Ecosystems Ecosystems are not completely separate Ecotones: transition zones Environmental Factors • Conditions – Temperature, pH, salinity, etc. • Resources – Used by organisms (e.g., light, food) • Habitat – Kind of place a species is adapted to live
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