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Kingdom Animalia Metazoa - Questions and Answers

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46. Tube-within-a-Tube body plan is shown by
A. Coelenterates
B. Platyhelminthes
C. Aschelminthes (Nemethelminthes)
D. Porifers
Explanation:
47. Pinacoderm is
A. Name of body wall of sponges
B. Outer body layer of sponges
C. Inner body layer
D. Middle layer of body wall
Explanation:
48. Sponges lack
A. Body plan
B. Cellular differentiation
C. Appendages
D. Sexual reproduction
Explanation:
49. A dried piece of sponge is composed of
A. Cellulose fibres
B. Silk fibres
C. Spongin fibres
D. Elastic fibres
Explanation:
50. Mesohyl layer of sponges is
A. Nonliving
B. Noncellular
C. Gelatinous
D. All the above
Explanation:
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