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Kingdom Animalia Metazoa - Questions and Answers

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246. What is characteristic of deuterostomes
A. Spiral cleavage, blastopore becoming mouth
B. Radial cleavage, blastophore becoming anus
C. Spiral cleavage, blastopore becoming anus
D. Radial cleavage, blastopore becoming mouth
Explanation:
247. In deuterostomia, embryonic blastopore produces
A. Mouth
B. Anus
C. Gonopore
D. Both A and B
Explanation:
248. Spicule producing cells of sponges are
A. Spongioblasts
B. Calcoblasts
C. Silicoblasts
D. Both B and C
Explanation:
249. Invertebrate constitute percentage of animal kingdom
A. 98%
B. 75%
C. 60%
D. 30%
Explanation:
250. Spicules are formed by
A. Calcoblasts
B. Scleroblasts
C. Spongioblasts
D. Silicoblasts
Explanation:
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