An arthropod's exoskeleton performs all of the following functions except
A. production of gametes.
B. protection of internal organs.
C. support of the animal's body.
D. preventing loss of body water.
Most adult echinoderms have which of the following?
A. two-part bilateral symmetry
B. five-part bilateral symmetry
C. five-part radial symmetry
D.an asymmetrical body
Which of the following is a characteristic of all arthropods?
A. simple, single-lens eyes
B. setae
C. jointed appendages
D. jaws
Gas exchange in an echinoderm takes place through
A. book lungs.
B. skin gills.
C. lungs.
D. none of the above
Arthropods periodically shed and discard their exoskeletons as they grow in a process called
A. segmentation.
B. molting.
C. reproduction.
D. metamorphosis.
All of the following are arthropods except
A. crustaceans.
B. echinoderms.
C. arachnids.
D. insects.
The cephalothorax is a fusion of
A. the head and tail region.
B. the abdomen and thorax region.
C. the head and thorax region.
D. none of these.It is not fused.
Oxygen is moved around the body of an echinoderm in its
A. madreporite.
B. bony plates.
C. water vascular system.
D. arms.
What are the three main body segments in arthropods?
A. cephalothorax, abdomen and appendages
B. thorax, appendages and spiracles
C. head, cephalothorax and appendages
D. head, thorax and abdomen
This adult organism can be described as a
Select all answers that apply.
A. invertebrate.
B. vertebrate.
C. chordate.
D. nematode.
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