e . a post-anal tail
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Question 8
Both echinoderms and chordates are deuterostomes , this means that
Select one :
a . They have a similar development in their embryonic stages .
b . They both have eyes that have retinas .
c . They both start with radial symmetry in their early embryonic stages .
d . They both use calcium based endoskeletons .
e . They are both invertebrates .
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Question 9
Non-vertebrate chordates , tunicates and lancelets , differ from other chordates in that
Select one :
a . They do not have a notochord .
b . They have gills while other chordates have lungs .
c . They do not have jaws while all other chordates do have them .