Which feature is common to both Annelida and Mollusca?
1. Radula
2. Dorsal nerve cord
3. Trochophore larva
4. Chitinous exoskeleton
Subtopic:  Phylum Annelida | Phylum Mollusca |
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In a typical mollusc:

I: Head, muscular foot and visceral hump are body segments.
II: Mantle over the visceral hump is formed by a layer of skin.
III: Radula is a file-like rasping organ
 
1. Only III is correct
2. Only II and III are correct
3. Only I and III are correct
4. Only I and II are correct

Subtopic:  Phylum Mollusca |
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The largest phylum of marine animals is:

1.Arthropoda2.Echinodermata
3.Cnidaria4.Mollusca

Subtopic:  Phylum Mollusca |
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