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Domains, Kingdoms, and Phyla. Grouping Organisms And Classification. Age of Life on Earth. 3.5 million years ago 1.5 million species named by classification system called taxonomy (to name and group organisms in a logical manner). Domains. 3 largest classification groups Archaea
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Domains, Kingdoms, and Phyla Grouping Organisms And Classification
Age of Life on Earth • 3.5 million years ago • 1.5 million species named by classification system called taxonomy (to name and group organisms in a logical manner)
Domains 3 largest classification groups Archaea Eubacteria Eukarya
THREE Domains…Kingdoms Eubacteria Archaea Eukarya (true bacteria) (extreme (protists bacteria) fungi plants animals) (Prokaryotic) No true nucleus True Nucleus
King Phillip Could Order Five Greasy Subs
Two Domains: Prokaryotic • Genetic material NOT in a nucleus • INCLUDES: • Eubacteria –true bacteria • Archaea –extreme bacteria
Kingdom: Archaea • Prokaryotic –no nucleus • Cell walls with no peptidoglycan • Unicellular – one celled • Live in most extreme environments
What is peptidoglycan? • A cross-linked complex of polysaccharides and peptides found in the cell walls of bacteria • (in other words: • Starch and protein)
Kingdom: Archaea • Thermophiles –love heat • Psychrophiles –cold-loving • Acidophiles –love acidic environments • Halophiles-love salty • Barophiles-high pressure (ocean bottom)
Archaea • Thermus aquaticus (Taq)
Archaea Sulfur-loving
Kingdom: EUBACTERIA (true bacteria) • Prokaryotic – no nucleus • Cell wall with peptidoglycan • Unicellular –one-celled • Diverse environments and metabolism
Eubacteria • Staphyloccus • Anthracis bacillus
Eubacteria • Neisseria gonorrhoeae • E. coli
Eukarya HAVE A NUCLEUS All other organisms Protists Fungi Animals Plants
Kingdom: Protista • Eukaryotic – DO have a nucleus • Usually unicellular • Amoeba nucleus • Varied cell walls
Euglena Paramecium Protista Examples
Kingdom: FUNGI • Eukaryotic • Cell walls of chitin –stiffener • Can be multicellular or unicellular
Fungi • Yeast • Can you see the budding?
Kingdom: Plantae • Eukaryotic • Cell wall made of cellulose • Multicellular –more than one cell • Autotrophic –photosynthetic – make their own food
What is cellulose? Stiff, interlocking fibers in plants
Kingdom: Animalia • Eukaryotic • No cell wall • Multicellular • Heterotrophic –need to get food from other sources (plants and animals)
Animalia Phyla • Porifera (Sponges) • Cnidaria (jellyfish) • Platyhelminthes (Flatworms) • Nematoda (Roundworms) • Mollusca (octopus, clams) • Annelida (Segmented Worms) • Arthropoda (insects) • Echinodermata (starfish) • Chordata (mammals, fish, birds, reptiles)
Phylum Porifera • “pore bearer” • Empty sac with pore cells on outside • sponges • Porifera Video
Phylum Cnidaria • “stinging nettle” • Jellyfish, coral, sea anemones • Radial symmetry, tissues, prey on animals • Phylum Cnidaria (Jellyfish) swimming, close-up
Phylum Platyhelminthes • Means “flat and wide worm” • Live in sea and fresh water • Some are parasites • One opening - food/wastes • Bilaterally symmetrical • Planaria, tapeworms • Stock Video of A planaria on plant stems
Phylum Nematoda • Means “thread” • One body opening for food and one for wastes • Trichina worm, hookworm
Phylum Mollusca • Means “soft bodied” • Aquatic (gills), digestive tract • Snails, octopus, clams • Mollusks Video
Phylum Annelida • Means “ringed” or segmented worm • Digestive, nervous, circulatory systems • Earthworms and leeches
Phylum Arthropoda • Means “jointed foot” • Have an exoskeleton (exterior) • Segmented body, lungs/tracheae • Insects (flies, wasps, beetles), crustaceans (lobster, shrimp), arachnids (spiders)
Phylum Echinodermata • Means “spiny skinned” • Starfish, sea urchin, brittle star • Spiny skin and radial symmetry (5 arms coming out from center)
Phylum Chordata • Means “having a chord” • Have a backbone • Have 9 systems (circulatory, nervous, skeletal, digestive, respiratory, etc.) • Amphibians, Fish, Reptiles, Birds, Mammals
Great Pictures Phyla Quiz • Phyla Quiz • Match organism to phylum
Classification • How do you organize all the 14 million species? Approximately 1.5 million species have so far been identified and scientifically Described.
Carolus Linnaeus (1707-1778) • Father of Taxonomy • His system for naming, ranking, and classifying organisms is still in wide use today
Taxons(Groups for Classification) • Kingdom Phylum Class Order Family Genus Species
Humans Classification (Know) • Kingdom Animalia • Phylum Chordata • Class Mammalia • Order Primates • Family Hominidae • GenusHomo • Speciessapiens
How do you write a scientific name? • First letter of Genus is capitalized and the rest is lower case • Either underline the genus and species OR italicize the genus and species • Written in Latin
Scientific Name • Genus and species • Homo sapiens • Homo sapiens