1-31-08 notes

1-31-08 notes - Biology January 31, 2008 CQ: Which of the...

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Biology January 31, 2008 CQ: Which of the following characteristics are NOT used to classify animals? A) Presence of Absence of Real Tissues B) Number of cell types C) Symmetry D) Features of embryonic development Invertebrates 1 Animals without “backbones Today’s featured organism: -Dicrocoelium dendriticum Lancet fluke Multiple hosts o Land snail o Ant o Sheep Central nervous system Parasite manipulation o Zombie ants o Only in the evening -Cucliophora Found in 1995 In the mouthparts of lobsters Only 2 species in the phylum Size—1/3 mm Molluscs
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Four major groups o Poluplacophora (chitons) Also called sea cradle o Gastropoda (snails and slugs) o Bivalvia (clams, mussels, etc.) o Cephalopoda (octopus, squid, cuttlefish) Have varied appearance but similar body parts o Foot o Visceral mass o Mantle Octopus o Known for their intelligence—capable of complex behavior Jar opening Shape recognition Short- and long-term memory Complex eye
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1-31-08 notes - Biology January 31, 2008 CQ: Which of the...

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