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Around the mouth of a sea star is a circle of nerve fibers called a ___.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
Echoinderm larvae have ___.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
The plate on the top of a sea star through which water enters the vascular system is called the ___.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
Name the four major groups of echinoderms.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
Echinoderm means ___.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
Echinoderms contain a (n) ___ similar to the kind that vertebrates have.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
The tiny suckers on a sea star's arms that help it to move and capture food are called ___.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
Echinoderms live ___.
sieve plate
bilateral symmetry
endoskeleton
tube feet
in salt water
nerve ring
sea stars, brittle stars, sand dollars, sea cucumber
spiny skinned
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