Term
| I.D. the 3 Deuterostome groups |
|
Definition
1. Echinoderms
2. Hemichordates
3. Chordates |
|
|
Term
| Main chordate characteristics |
|
Definition
-notochord
-pharynx with slits
-hollow, dorsal nerve chord
-postanal tail
-endostyle or thyroid
-heart that pumps blood ventrally in anterior direction
-segmentation |
|
|
Term
|
Definition
|
|
Term
|
Definition
| feeding and some respiration |
|
|
Term
| endostyle or thyroid function |
|
Definition
|
|
Term
| chordate characteristics of echinoderms |
|
Definition
| none, but share development pattern with chordates and some are filter feeding (ex. seastars, sea cucumbers, etc.) |
|
|
Term
| chordate characteristics of hemichordates |
|
Definition
| pharyngeal slits (ex. acorn worms) |
|
|
Term
| 3 subphylum of phylum chordata |
|
Definition
1. Urochordata (tunicates)
2. cephalochordata (amphioxus)
3. Craniata (vertebrates and hagfish) |
|
|
Term
| observance of chordate characteristics |
|
Definition
| most are seen during larval stage, but pharynx present throughout life |
|
|
Term
|
Definition
| do not feed, pharynx for respiration only |
|
|
Term
|
Definition
| incurrent/excurrent siphons |
|
|
Term
| cephalochordata respiration |
|
Definition
|
|
Term
|
Definition
| filter feeder with wheel organ, no muscles in phrynx |
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|
Term
|
Definition
|
|
Term
| proposed evolutionary sequence |
|
Definition
1. echinoderm-like
2. Hemichoradate-like
3. tunicate-like
4. cephalochordate-like (???) |
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|
Term
|
Definition
| juvenile traits are maintained into adulthood |
|
|
