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16 Cards in this Set
- Front
- Back
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Name the types of Mollusks
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Bivalves-clams and scallops
Gastropoda-snails and slugs polyplacophora-chitons (8 plated) Cephalopoda-squids octapus |
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Bivalves
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part of mollusks
suspension feeders have two shells |
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Gastropoda
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snails, slugs, nudibranchs(stomach foot)
-has radula used to cut plants -mantle secretes shell to create more shell -herbavores, detritovores, predatory carnivors (cone shells use harpoon to fish |
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Polyplacophora
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chitons have 8 plates on back
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Cephalopoda
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squids, octapus, nautilus,cuttle fish
-usually jets with mantle -camoflague with color and texture -intelligent -complex eyes |
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Ecdysozoa
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exoskeleton that sheds
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What groups are in Ecdysozoa
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Nematoda and Arthropoda
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Nematodes
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round worms
-no circumferencial muscles -free living but also parasitic -pseudocoelom ex: catipillars |
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Arthropods
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-jointed legs
-exoskeleton -coelom sensory system: -simple eye(light or dark) -compound eye (image) -chemosensory like antennae |
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oviparity
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egg bearing
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vivaparity
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live bearing
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Doushantou Formation
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570 mya
-sponges -jellyfish -bilateral sulfer bacteria |
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Ediacarian Formation
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550 MYA
-sponges -cnidarians -ctenophores -arthropod |
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Burgess Shale
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510 MYA
-sponges -jellyfish -arthropods -mollusks -echinoderms -chordates |
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Cambrian Explosion
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cambrian animals don't look like recent animals
-hox gene -ecological- volcanoes form bubble and we can study the air inside bubble |
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Themes in Animal Evolution
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-orginization of cells into tissues
-symmetry and cephalization -body cavity-coelom -developmental patterning |
