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Phylum Arthropoda - Questions and Answers

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386. Exoskeleton of echinodermis is
A. Calcareous
B. Siliceous
C. Tunicin
D. Chitinous
Explanation:
387. Secondary radial symmetry occurs in
A. Jelly fish
B. Echinodermata
C. Hemichordata
D. Cnidaria
Explanation:
388. Star Fish is
A. Asymmetrical
B. Radially symmetrical
C. Bilaterally symmetrical
D. None of these
Explanation:
389. Which trait is not characteristic of echinodermata?
A. Aristotle’s lantern
B. Water vascular system
C. Radial and indeterminate cleavage
D. Trochophore larva
Explanation:
390. Palamnaeus (Scorpion) belongs to class arachnida because of
A. 4 pairs of legs
B. Chelate legs
C. Sting
D. None
Explanation:
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