• Chordates include vertebrates and invertebrates that have a notochord.
  • Tunicates are one of two subphyla of invertebrate chordates.
  • Lancelets reproduce sexually and have separates sexes.
  • Both tunicates and lancelets are small and primitive.
  • They are probably similar to the earliest chordates that evolved more than 500 million years ago.
  • Can you find tunicates?
  • Name and describe the two subplurals of chordates: Tunicates and Cephalochordata.
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