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17 Cards in this Set
- Front
- Back
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3 early developmental patterns in deuterostomes
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-radial cleavage
-mouth forms opposite of blastopore -coelom develops fro mesodermal pockets |
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3 clades of deuterostomes
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echinoderms
hemichordates chordates |
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describe echinoderms
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-pentaradial symmetry as adults (bilateral as larvae)
-sea stars, sea urchins -tube feet function as locomotion/feeding/defense |
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describe hemichordates (2)
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-acorn worms
-pterobranches |
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3 clades of chordates
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-urochordates
-cephalochordates -vertebrates |
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4 characteristics of all chordates sometime during lifetime (describe each characteristic)
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-notochord: fluid-filled vacuoles; urochordates rid of this; vertebrates exchange for nerve chord
-pharyngeal slits: gas exchange, filter feeding, one way flow in head -dorsal, hollow nerve chord: ectoderm folds over -tail-bone |
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2 characteristics of cephalochordates
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-novachord retained throughout life
-burrowing animal |
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urochordates describe what type of animals
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all marine animals
-sea squirts |
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4 characteristics of vertebrates
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-anterior skull, large brain
-rigid internal skeleton supported by vertebrae -internal organs -well-developed circulatory system and ventral heart |
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two simple forms of vertebrates
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-hagfish
-lumpreys |
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what are chondrichthyans
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finned fishes with skeletons of cartilages
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what are ray-finned fishes
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calcified bones
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significance of coelocanths
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jointed fins evolved from these
-tetrapods |
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what are first vertabrates to colonize land
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tetrapods
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significance of amniotes
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-amniotic egg that is impermeable to water
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archosaurs (reptiles) consist of
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crocodiles
dinosaurs birds |
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3 characteristics of amphibians
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-confined to moist habitats
-lose water easily through skin -eggs dry out if exposed to air |
