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Which are the oldest Echinoderms?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
Which echinoderm adaptation makes them more advanced than any other invertebrate?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
What is the correct order for water flow entering a sea star?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
Which structures are found in the central disk of a sea star?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
How many years have Echinoderms existed?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
What type of body plan do echinoderms have?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
Which echinoderm is elongated and can regenerate its internal organs?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
What does the word echinoderm mean?
madroporite, stone canal, ring canal, radial canal, lateral canal, tube feet
spiny skin
mouth and stomach
500 million
sea cucumber
endoskeleton
pentaradial symmetry
crinoids
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