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  1. Warmup T-chart as many differences as you can.

  2. Warmup T-chart as many differences as you can.

  3. March 29TH, 2010 Arthropods

  4. Examples of Each Echinoderms Starfish, Sea Urchins Vertebrate Invertebrate Centipedes & Millipedes Porifora Sponges Arthropods Cnidarians Jellyfish, Anemnone Mollusks Flatworms Tapeworm Crustaceans Shrimp, Lobster, Crawfish Arachnids Tarantula, Black Widow Gastropods Snails, Slugs Roundworms Heartworm Insects Beetles, Flies Segmented Worms Earthworm Bivalves Clams, Oysters Cephalopods Octopi, Squid

  5. Arthropods Main Ideas Exoskeleton

  6. Arthropod Main Ideas Group comparison How would you arrange the groups on a branching diagram so that they are most similar from right to left, and why? We know from our Evolution unit that antennae and legs are homologous structures. Review that idea. Would it be smart to add the legs to the antennae and use that in the similarities comparison?

  7. Arthropod Main Ideas Body sections: Head Thorax Abdomen Other parts: Antennae Wings Mandibles Flippers Flipperettes

  8. Reproduction and Growth Cycles With Metamorphosis Egg Larva Pupa Adult Without Metamorphosis Egg Nymph Adult Sketch! Sketch! Hives are group organizations where a queen reproduces for the entire group. Since they all share at least 50% of their genetic material, it is still adaptive for workers to support the queen, because the offspring are almost as related as their own offspring would be. Specialization of labor occurs in hives, where slightly different versions of the same species are bred to do a particular task their entire life. Ex: Queen, drone, worker, warrior, nester

  9. Grasshopper Dissection Prep External Anatomy Internal Anatomy

  10. Goals • Students will understand the scale of similarities and differences that contribute to classifications at the phylum and class levels of the hierarchy. • Students will understand the form and function of arthropods through hands-on work with two representative species. • Students will know how to use lists (defined vocabulary), data tables, graphs, and labeled diagrams to convey results and scientific information.

  11. Grading • 1 pt per complete dissection • Anatomy list with descriptions • Sufficient labelled diagrams • 2 pts for questions answered thoughtfully

  12. Questions Outline your responses first with your group. Then write a multi-paragraph essay for each prompt. Which differences between the crawfish and grasshopper are important adaptations to their respective environments? What similarities contribute to their similar classification at the phylum level but different classification at the Class level? Which organism is more sophisticated? Justify your answer based on your observations.