General Characteristics of Echinoderms
Echinoderms completely lack
respiratory structures
sensory appendages
excretory organs
digestive system
excretory organs
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Series of calcium carbonate plates in skeleton of echinoderm is called:A. shell
B. covering
C. ossicles
D. pits
Number of living species of echinoderms is nearly:
A. 5000
B. 6000
C. 4000
D. 7000
Skeleton of echinoderms is made up of:
A. proteins
B. calcium
C. nitrogen
D. urea
Larva of echinoderms, having
A. pentaradial symmetry
B. bilateral symmetry
C. lateral symmetry
D. radial symmetry
Phylum that has exclusively marine animals is:
A. echinodermata
B. chordata
C. reptilia
D. animalia
Sea urchin has characteristic feature of:
A. Aristotle s lantern
B. spines
C. bristles
D. tube feet
Adult echinoderm has:
A. pentaradial symmetry
B. bilateral symmetry
C. lateral symmetry
D. radial symmetry
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