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20 Cards in this Set
- Front
- Back
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when did multicellularity evolve?
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in the porifera
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what evolved in the cnidarians an the ctenophores?
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radial symmetry and dipoblastic tissue evolve, mobility, and the blind sac evolved
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what evolved int hea acoelomorpha?
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bilateral symmetry, tripoblastic tissue, and cephalization
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when did pharyngeal gill slits first evolve?
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before the echinodermata
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what evolved in the urochordates?
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post anal tail
hollow nerve chord stiff notochord |
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when did vertebrea first evolve?
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in the sharks
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when did jaws first evolve?
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sharks
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what era was bone first invented? at what lineage was it first invented?
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-ordivician
-mxynoidea |
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what evolved in the dipnoi?
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lungs
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when did the limbs first evolve?
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in the anura the frogs
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when did the amniotic egg first evolve?
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in the mamma
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what does vertebrate all have?
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skulls
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when did chordata first appear?
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the Burges shale
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what are protozoans?
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organisms with no tissue
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what are metazoans?
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organisms with tissues
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when did the opposable thumb first evolve?
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in the new world monkeys
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what came first the new world or the old world monkeys?
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new
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whendid fist walking and no tails first evolve?
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in the oragnutans
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when did kunckle walking first evolve?
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in the gorillas
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when did bipedialism first come about?
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in the humans
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