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Arthropods (crustaceans & Insects)

Arthropods (crustaceans & Insects). By: Kelly Lessard & Danielle White February 9 th , 2011 AP Biology . Number of Species . More than 1 million species, most of which are insects. (pg. 690-691) Two out of three species in the world are members of the Arthropoda phylum. .

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Arthropods (crustaceans & Insects)

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  1. Arthropods (crustaceans & Insects) By: Kelly Lessard & Danielle White February 9th, 2011 AP Biology

  2. Number of Species • More than 1 million species, most of which are insects. (pg. 690-691) • Two out of three species in the world are members of the Arthropoda phylum.

  3. Anatomical Features • Exoskeleton impermeable to water which help prevent desiccation • Well developed, sensory organs (eyes, olfactory receptors, and antennae) • Open circulatory system • Specialized Gas-exchange organs • Bilateral Symmetry

  4. Endangered Species • American Burying Beetle • Hine’s Emerald Dragonfly • Karner Blue Butterfly • Mitchell’s Satyr Butterfly

  5. The Four Major Subphyla

  6. Cheliceriforms • Body had one or two main parts • Six pairs of appendages • Mostly terrestrial or marine Ex. Horseshoe Crab

  7. Myriapod • Heads have antennae and chewing mouthparts • Terrestrial Millipedes have two pairs of walking legs per trunk segment. Centipedes have one pair of walking legs per trunk segment and have poison claws

  8. Hexapod (insects) • Body divided into head, thorax, and abdomen • Antennae present • Mouthparts modified for chewing, sucking, and lapping • Three pairs of legs • Usually two pairs of wings • Mostly terrestrial Ex. Dragonfly

  9. Continued… • Incomplete Metamorphosis (ex. Grasshopper) • Complete Metamorphosis (ex. Butterfly)

  10. Crustacean • Bodies have two or three parts • Antennae present • Chewing mouthparts • 3 or more pairs of legs • Mostly marine and freshwater Ex. Ghost Crab

  11. Bibliography • Campbell, N. (2008). Ap edition biology. San Francisco, California: Pearson Education. • (n.d.). Retrieved from http://eelink.net/EndSpp.old.bak/ESimages/ESarthropods.html

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