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Abiotic and Biotic Factors

Abiotic and Biotic Factors

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Abiotic and Biotic Factors

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  1. Abiotic and Biotic Factors

  2. Biotic factor: living, or once living, factor in an ecosystem Biotic and Abiotic Factors

  3. Biotic and Abiotic Factors • Abiotic factor: physical, or non living, factor in an ecosystem • Abiotic factors were NEVER living

  4. Characteristics of Living Things

  5. How do we know something is alive? • Universal genetic code (DNA) • Made up of cells

  6. How do we know something is alive? • Reproduction • Growth and development

  7. How do we know something is alive? • Response to environment • Energy

  8. How do we know something is alive? • Maintain stable internal environment (homeostasis) • Adaptation and Evolution

  9. Is it ALIVE?! Chalk Fire Earthworm Apple seed Pine tree Mildew Sand Potato Rose bush Ocean Corn Mouse Dirt Virus Mushroom Frog Snake Milk Blood Chair As a pair, tell me whether each object above is alive or not alive. Explain your reasoning for each using what you just learned about living vs. non-living things.

  10. Classification of Living Things

  11. How are organisms classified? • Similarities in: • Habitat • Adaptations • DNA sequences and number of genes • Evolutionary relationships • Homologous structures • Similarities in embryology

  12. Cladograms • Shows evolutionary relationships among groups of organisms • Derived characters: characteristics that appear in recent parts of a lineage but not in older members

  13. Hierarchy of Classification Kingdom Phylum Class Order Family Genus Species

  14. Kingdoms Five Kingdoms Six Kingdoms Eubacteria Archaebacteria Protista Fungi Plantae Animalia • Monera • Protista • Fungi • Plantae • Animalia

  15. Animals • Multicellular • Heterotrophic • No cell walls

  16. Types of Heterotrophs • Heterotroph: cannot make it’s own food • Must eat to obtain energy • Herbivore • Carnivore • Omnivore • Parasite • filter feeder • Detritus feeder (Detrivore)

  17. Animal Phyla • Porifera • Cnidaria • Ctenophora • Platyhelminthes • Annelids (Annelida) • Nematoda • Echinoderm (Echinodermata) • Arthropods (arthropoda) • Mollusks (molussca) • Chordates (chordata)

  18. Characteristics of all Chordates • Have 4 common characteristics for at least one stage of life • Dorsal, hollow nerve cord • Notochord (support structure below the nerve cord) • Pharyngeal pouches • Tail that extends beyond the anus • Most chordates are vertebrates

  19. Types of Vertebrates • Myxini - hagfishes • Cephalaspidomorpha - lampreys • Chondrichthyes - cartilaginous fishes • Osteichthyes - bony fishes • Amphibia - frogs, toads, salamanders • Reptilia - turtles, snakes, lizards • Aves - birds • Mammalia - mammals