Science Quiz / Echinoderms and Chordates

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Can you name the Echinoderms and Chordates?

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Definition/Information
Starfish; modified radial symmetry; no cephalization or brain; deuterostomes
Secondary radial symmetry means larvae are
No excretory organs mean they excrete by
Hard calcareous plates covered by thin skin
System with tube feet for movement, gas exchange, and feeding
Echinoderm ability to intentionally detach body parts that can regenerate
Chordates: Four innovations: 1
2
3
4
Subphyla-sessile filter feeders covered by tunic-Tunicates
Subphyla-Lancelets
Synapomorphies for Craniates: 1
2
Cells that develop near dorsal margins of neural tube that contribute to skeleton/jaw development
Least derived craniate lineage, jawless marine creatures
Synapomorphies for Vertebrates: 1
2
3
First vertebrates; parasitic adults
Mineralization began in
First vertebrate with mineralized mouth and pharynx
Jawless animal
Definition/Information
Hinged jaw developed first in
Animals with hinged jaws; lateral lines;mineralized endoskeleton; paired appendages
Jaws thought to be derived from these pharyngeal slit supports in fish
Fish with secondary cartilaginous skeletons; denser than water; two-chambered heart
Laying eggs in reproduction
Eggs retained in female; without placenta
Eggs develop in uterus; placenta nourishes young
Three Synapomorphies of bony fish: 1
2
3
Bony flap covering gill chambers
Fish with fins supported by bony flexible rods
Fish with muscular and pectoral fins
Fish with powerful bite and special joint;and hollow notochord filled with fluid
Fish with gills and lungs
Animals with 4 limbs and feet;ears;derived from lobe finned fish
Tetrapod Land adaptations: 1
2
3
Live on land but must reproduce aquatically;'two lives'; three chambered heart; skin capable of gas exchange
Order with frogs and toads
Order with Salamanders
Caecilians, legless and snake-like

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