Chapter 15: Section 4 Question Preview (ID: 2099)
Invertebrates: Echinoderms.
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Echinoderms live ___.
a) on land
b) in fresh water
c) in salt water
d) all of the answers
Echinoderm means ___.
a) jointed limbs
b) spiny skinned
c) endoskeleton
d) shiny tube foot
Echoinderm larvae have ___.
a) radial symmetry
b) bilateral symmetry
c) no symmetry
d) radial and bilateral symmetry
Echinoderms contain a (n) ___ similar to the kind that vertebrates have.
a) endoskeleton
b) exoskeleton
c) segmented body
d) brain
An ampulla regulates ___.
a) blood pressure in a closed circulatory system
b) water pressure in a tube foot
c) blood pressure in a open circulatory system
d) none of the answers
The plate on the top of a sea star through which water enters the vascular system is called the ___.
a) tube feet
b) nerve ring
c) sieve plate
d) radial nerve
The tiny suckers on a sea star's arms that help it to move and capture food are called ___.
a) tube feet
b) nerve ring
c) sieve plate
d) radial nerve
Around the mouth of a sea star is a circle of nerve fibers called a ___.
a) tube feet
b) nerve ring
c) sieve plate
d) radial nerve
In sea stars, a ___ runs form the nerve ring to the tip of each arm.
a) tube feet
b) nerve ring
c) sieve plate
d) radial nerve
Name the four major groups of echinoderms.
a) sea stars, brittle stars, sand dollars, sea cucumber
b) jelly fish, hydras, sea anemones, corals
c) clams, squids, snails, slulgs
d) centipedes, arachnids, crustaceans, insects.
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