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Around the mouth of a sea star is a circle of nerve fibers called a ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
Echinoderms live ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
An ampulla regulates ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
Echinoderm means ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
The tiny suckers on a sea star's arms that help it to move and capture food are called ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
Echoinderm larvae have ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
Echinoderms contain a (n) ___ similar to the kind that vertebrates have.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
The plate on the top of a sea star through which water enters the vascular system is called the ___.
endoskeleton
sieve plate
water pressure in a tube foot
spiny skinned
in salt water
bilateral symmetry
tube feet
nerve ring
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