The Diversity of Living Things Section 4.3

Life is Diverse Classification- how scientists organize the varieties into categories 3 Million Species have been classified Millions are still unclassified

Six Kingdoms Prokaryotes (Bacteria) Heterotrophs- eat other organisms to get energy Photoautotrophs- make energy from light (photosynthesis) Chemotrophs- make energy from chemical substances like salts Divided into 2 Kingdoms: Kingdom Eubacteria- single celled; no nucleus; very common Kingdom Archaebacteria- single celled; no nucleus; live in harsh environments (hot springs, swamps)

6 Kingdoms Continued… 3. Protista Eukaryotes Can be either Autotrophs (can make their own food) or Heterotrophs Most live in water Mostly unicellular Diverse Examples: Paramecium, Amoeba, Euglena, kelp

6 Kingdoms Continued… 4. Fungi Eukaryotes Strictly Heterotrophic- absorb their food through their body surface Unicellular or Multicellular Have cell walls Most live on land Examples: mushrooms and yeast

6 Kingdoms Continued 5. Plantae (plants) Eukaryotic Autotrophic (Heterotrophic- Venus Fly trap**rare) Multicellular Examples: grass, trees, daisies, rosebush

6 Kingdoms Continued… 6. Animalia (animals) Eukaryotic Heterotrophs Multicellular No cell walls Bodies are flexible 2 classifications: Invertebrates Vertebrates

Insects Invertebrates Most abundant animal species on the planet. Why? a) have a waterproof exoskeleton b) they move quickly c) they reproduce quickly Many fly Small size allows them to hide from predators and live on very little food

Kingdoms of Life https://www.youtube.com/watch?v=oID1h-zL-uw