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25 Cards in this Set
- Front
- Back
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Diploblastic organism
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ectoderm
- protection endoderm - digestion |
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tribloplastic organism
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ectoderm
- protection endoderm - digestion mesoderm - allows differentiation of internal structures |
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hydrostatic skeleton
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permits locomotion
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what happens after locomotion?
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direction and sensory organisms develop
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deuterstomes
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- radial patterns of cell cleavage during early stages of development
- blastopore becomes anus during formation of guy |
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protostomes
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- spiral patterns of cell cleavage during early stages of development
- blastopore becomes mouth during formation of gut |
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porifera
Common name? Organization? |
common name - sponge
- body wall is gelatinous and trabeculate material - wall is supported by spongin (horny collagenous protein) and spicule minerals (spikes) |
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stromatoporids
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- looks like stromatolites
- makes bioherm |
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bioherm
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place where species come together
i.e - great barrier reef |
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cnidaria
common name? |
common name - corals
order rugosa order tabulata order scleractinia |
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order rugosa
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thick septa
solitary or colonial |
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order tabulata
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thick tabulae
colonial only |
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order scleractinia
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only one still alive
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trilobites
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ahtropoda phylum
trilobita class athropods w/ three lobes has calcitic exoskeleton has head with biramous appendages which is used for locomotoin and respiration |
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molusks
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common name - molllusca
gastropoda class cephalopoda class bivalvia class |
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gastropoda
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- snails and slugs
- has true head w/ eyes and sensory organs - univalve un-chambered shell - undergoes torsion during development |
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cephalopda class
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most complex
has chambered shell for buoyancy has tentacles around mouth has well developed head hyponome - for propulsion |
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bivalvia
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has enlarged gills for respirtation and filter feeding
has huge muscular foot has no real head no redula |
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bivalves (vs. braciopods)
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valves are identical to each other
has commisure as line of symmetry the anteroposterior axis is not a line of symmetry |
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brachiopods (vs. bivalves)
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two valves are different from one another
commisure is not line of symmetry anteroposterior axis i line of symmetry |
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bryozoan
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it's a filter feeder
is a small colonial organism has bi-radial symmetry |
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bi-radial symmetry
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symmetry in more than one direction
i.e - cone |
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echinodermata
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echinoid class
crinoid class |
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echinoid
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sea urchins
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crinoid
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sea lilies
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