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Which structure lies between the bivum rays?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
How many years have Echinoderms existed?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
What does the word echinoderm mean?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
What is the correct order for water flow entering a sea star?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
Which echinoderm adaptation makes them more advanced than any other invertebrate?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
Which are the oldest Echinoderms?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
What type of body plan do echinoderms have?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
Which echinoderm structures aid in movement, feeding and respiration?
tube feet
madroporite
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
endoskeleton
spiny skin
pentaradial symmetry
crinoids
500 million
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