BIOL 201 Chp 1 Introduction to Invertebrates
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BIOL 201 Chp 1 Introduction to Invertebrates

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This is a lecture presentation for my BIOL 201 Invertebrate Zoology students on Chapter 1: Introduction to Invertebrates (Invertebrate Zoology 7E by Ruppert, Fox, & Barnes, 2004)....

This is a lecture presentation for my BIOL 201 Invertebrate Zoology students on Chapter 1: Introduction to Invertebrates (Invertebrate Zoology 7E by Ruppert, Fox, & Barnes, 2004).

Rob Swatski, Assistant Professor of Biology, Harrisburg Area Community College - York Campus, York, PA.
Email: rjswatsk@hacc.edu

Please visit my website, BioGeekiWiki, for more biology learning resources: http://robswatskibiology.wetpaint.com

Visit my Flickr photostream for anatomy model photographs!
http://www.flickr.com/photos/rswatski/

Thanks for looking!

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BIOL 201 Chp 1 Introduction to Invertebrates BIOL 201 Chp 1 Introduction to Invertebrates Presentation Transcript

  • Chapter 1:Introduction to InvertebratesBIOL 201: Rob Swatski Assistant Professor of BiologyInvertebrate Zoology HACC-York
  • Invertebrates 99% of all extant animal species 1 million+ described species 10-30 million undescribed species Approx. 34 phyla 2
  • 3
  • Prokaryotes Eukaryotes No Organelles organelles present Nucleus No nucleus present Protists, Bacteria & fungi, plants, Archaea animals 4
  • 3 Domains of LifeBacteria Archaea Eukarya 5
  • Domain Bacteria 6
  • Domain Archaea 7
  • Domain EukaryaKingdom Kingdom Kingdom KingdomProtista Fungi Plantae Animalia 8
  • Kingdom Protista 9
  • Kingdom Fungi 10
  • Kingdom Plantae 11
  • Kingdom Animalia 12
  • DNAChromosomes Genes 13
  • 14
  • DNA double helix Single strand of DNA 15
  • 1859: Charles Darwin publishedThe Origin of Species 16
  • Main Ideasof Evolution Current species are descendants of ancestral species “Descent with modification” Natural selection Adaptation 17
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  • Evolution accounts for the unity & diversity of life 20
  • Phylum Overview 21
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  • Protozoa Animal-like protists Not part of kingdom Animalia Not invertebrate animals Important evolutionary link 23
  • Phylum Poriferasponges 24
  • Phylum Cnidaria jellyfishes,25 corals, anemones
  • Phylum Ctenophoracomb jellies 26
  • Phylum Platyhelminthes flatworms 27
  • Phylum Nemertearibbon worms 28
  • Phylum Nematodaroundworms 29
  • Phylum Molluscachitons, clams, snails, slugs, squid, octopi 30
  • Phylum Annelida31 segmented worms
  • Phylum Arthropodahorseshoe crabs, arachnids,crustaceans, myriapods, insects 32
  • Phylum Phoronida33 lopohophorates
  • Phylum Brachiopoda34 lamp shells
  • Phylum Bryozoabryozoans 35
  • Ernst Haeckel 36
  • Phylum Echinodermatastarfishes, brittle stars,sea urchins, sea cucumbers, sand dollars 37
  • 38
  • Phylum Hemichordataacorn worms 39
  • Phylum Hemichordatapterobranchs 40
  • Phylum Chordatatunicates 41
  • Carl Linne“You can call me Carolus Linnaeus” 42
  • Taxonomy …Today Traditional rank-based Linnaean classification still used, but limited value Binomial nomenclature (Genus, species) still popular Much more emphasis on evolutionary relationships (phylogenetic systematics) Change is the only constant in taxonomy 43
  • Cladistics Modern method of understanding phylogeny Create phylogenetic trees (cladograms) Based on morphology or molecular data Homology vs. Analogy 44
  • 45
  • Autoapomorphies: evolutionary novelties 46
  • 47
  • Synapomorphies 48
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  • Ground Plan Helps our Basic set of understanding ofcharacteristics of differences & each phylum similarities between phyla 50
  • Example of a ground plan: 51
  • Credits by Rob Swatski, 2010 Visit my website for more Biology study resources! http://robswatskibiology.wetpaint.com http://www.flickr.com/photos/rswatskiPlease send your comments and feedback to: rjswatsk@hacc.edu This work bears an Attribution-Noncommercial Share Alike Creative Commons license. 52