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SLU GBIO 107 Ch. 38 part 4 of 5 Animals
Terms in this set (19)
_______ includes several groups, one of which contains humans and most in this phylum are vertebrates.
notochord, dorsal nerve cord, pharyngeal slits, postanal tail
Key features of Chordates are _____.
Each chordate has several features at some point during its life including a _____ that in many chordates, develops into the backbone.
dorsal, hollow nerve cord
Each chordate has several features at some point during its life including a ___ that in many chordates, develops into spinal cord.
Tunicates and lancelets
____ are invertebrates that resemble ancestral chordates.
Describes an organism that remains attached to a surface for its entire life and does not move
_____ are free swimming; adults are sessile.
an elongated body with no heart
Lancelets have ____.
tunic covering a saclike body
Tunicates have a _____.
____ filter-feed with their tails buried in the sediment.
A hagfish is a marine invertebrate with a ____ that surrounds and protects the brain.
____ were the first chordates with vertebrae, which protect the spinal cord.
a cranium and a cartilage skeleton
Lampreys have a ____.
The sticky slime that ______ secrete, helps them slide their bodies out of danger.
Fishes are aquatic vertebrates with ____.
a swim bladder and paired fins
Bony fishes have ____
cartilage skeleton and paired fins
Cartilaginous fishes have ___.
Lobed-fins were the precursors to the limbs that define the ____.
_____ have lungs that are homologous to those of tetrapods.
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