Term
| Characteristics of deuterostomes |
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Definition
-yunnanozoans are likely ancestors
-triploblastic
-coelomates
-internal skeleton
-have 2 major clades (echinoderms and
hemichordates |
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Term
| Echinoderms and hemichordates |
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Definition
-compose one clade
-3 part coelom, bilaterally symmetrical and,cilliated larvae |
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Term
|
Definition
-Compose second clade
-nonfeeding, tadpole-like larvae
-unique dorsal supporting structure |
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Term
|
Definition
-pentaradial symmetry
-complete digestive system
-coelomates;sexual reproduction,slow
moving
-calcified internal skeleton and H2O vascular system-gas exchange, locomothin and feeding |
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Term
|
Definition
-subphylum of echinodermata
-one surving class called crinoidea which includes the seas lillies and feather stars
-numerous arms up to several hundred |
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Term
|
Definition
-5 part body plans the
-are the dominant echinoderms
-includes classes: Echinoidea(sea urchins and sand dollors), Holothuroidea (sea cucumbers),asteroidea(sea stars), Ophiuroidea(brittle stars) |
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Term
| Phylum Hemichordata (acorn worms and pterobranchs) |
|
Definition
-3 part body with a probiscus for digging
-pharyngeal slits for gas exchange
-similar to echinoderms and chordates |
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Term
|
Definition
-2nd major lineage of deuterostomes
-3 subphyla: Urochordata cephalochordata and vertebrata
-bilateral symmetry
-pharyngeal slits
-dorsal, hollow nerve chord
-ventral heart
-tail that estends beyond rod
-dorsal supporting rod called notochord |
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Term
|
Definition
-marine and most are sessile
-tadpole like larva
-most are colonial
-loses notochord and nerve chord during metamorphosis to adult
-pharyx is enlarged to pharyngeal basket in adult form |
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Term
| Cephalochordata (lancelets) |
|
Definition
-tiny fish like animals
-use pharyngeal basket to catch prey
-notochord extends the length of the body throughout life |
|
|
Term
|
Definition
-dorsal vertebral column replaced the notochord as primary support
-2 pairs of appendages
-anterior skull with enlarged brain
-internal organs suspended in coelom
-well developed circulatory system |
|
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Term
|
Definition
-improved nutrition
-gill arches made of cartilage supported gills
-modified to form joaws
new food sources-adaptive radiations |
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Term
| adaptations to life on land |
|
Definition
-jointed fins evolved into walking legs
-urination from kidneys
-tough skin
-the aminiotes were 1st vertebrates to be successful on land |
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Term
| Mammalian characteristics |
|
Definition
-mammary glands
-development of embryo internally
-hair
-most bear live young
skeletal simplification
-single jaw bone
-decreased size of limbs and pelvic girdle
-highly differentiated teeth |
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Term
| Primates,Prosimians, anthropoids, Homonids, characteristics and examples |
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Definition
-primates descended from small tree living mammals
-split into prosmians and anthropoids
-prosimians are lemurs, pottos, and lorises
-anthropoids includes tarsiers,monkeys,apes and humans
-hominids lineage led to humans |
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