Question

7 Which of these is not true of the chordates?
have tightly packed cells
have tubular nerve chords
they have no notochord
have gill slit at some stages

8 A vertbral column replaces the ------------ in vertebrates
notochord
gill slits
tubular nerve chords
flexible rod of tightly packed cells

9 Which of the following is not true of the vertebrates?
possession of endoskeleton
have a well developed sense organs
have backbones
bodies are not bilaterally symmetrical

Answer 1

7. they have no notochord
8. Notochord
9. bodies are not bilaterally symmetrical