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9 Cards in this Set

  • Front
  • Back
All Cordates possess what four features at some stage of their lives?
Notocord, nerve cord, pharyngeal gill slits, post-anal tail
What chordate characteristic is present in adult humans?
the nerve cord
Chordates are characterized by _______.
A post-anal tail
What are two examples of invertebrate chordates?
Lancelets, Tunicates
Filter-feeding chordates rely on ______, which have cilia that create water currents and mucous sheets that capture food suspended in the water.
Gill Slits
What are the 3 functions of a backbone?
- Supports Body
- Provides attachment sites for muscles
- Protects nerve cord and brain
What are 3 adaptions have allowed vertebrates to successfully invade most habitats?
- Endoskeletons that can grow and repair itself
- Paired appendages (fins, legs, wings)
- Increased size and complexity of the brain and sensory structures
Where were earliest vertebrate fossils found?
in 530 million year old rocks
What did the earliest vertebrate fossils found look like?
Resembled lancelets with a brain, skull, and eyes