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Q. No.Subtopic: Â Phylum Mollusca |
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Radula is a rasping and feeding organ characteristic of:
1. Echinoderms
2. Arthropods
3. Annelids
4. Molluscs
1. Echinoderms
2. Arthropods
3. Annelids
4. Molluscs
Subtopic: Â Phylum Mollusca |
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In all mollusks except bivalves, there is a tongue like, toothed structure that is used to scrape off food from the surface of rocks and to convey it toward the digestive cavity. This structure is called a
1. metanephridium
2. radula
3. ctenidium
4. palp
1. metanephridium
2. radula
3. ctenidium
4. palp
Subtopic: Â Phylum Mollusca |
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Examine the figures A, B, C and D. In which one of the four options all the items A, B, C and D are correct?
| (A) |  |
(B) |  |
| (C) |  |
(D) |  |
Options:
| A | B | C | D | |
| 1. | Ophiura | Unio | Antedon | Sepia |
| 2. | Asterias | Dentalium | Echinus | Sepia |
| 3. | Asterias | Pila | Ophiura | Octopus |
| 4. | Asterias | Unio | Ophiura | Sepia |
Subtopic: Â Phylum Mollusca |Â Phylum Echinodermata |
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Body is covered by a calcareous shell and is unsegmented with a distinct head, muscular foot and visceral hump in:
| 1. | Ctenophores | 2. | Mollusks |
| 3. | Echinoderms | 4. | Annelids |
Subtopic: Â Phylum Mollusca |
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Which of the following is true for Phylum Mollusca?
| 1. | Largest Phylum |
| 2. | Radial Symmetry |
| 3. | Triploblastic animals |
| 4. | Segmentation present |
Subtopic: Â Phylum Mollusca |
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Level 1: 80%+
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Which of the following is a key feature of mollusks?
1. Presence of a chitinous exoskeleton
2. Development of a mantle
3. Radial symmetry and a sessile lifestyle
4. Lack of a true coelom
1. Presence of a chitinous exoskeleton
2. Development of a mantle
3. Radial symmetry and a sessile lifestyle
4. Lack of a true coelom
Subtopic: Â Phylum Mollusca |
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Level 1: 80%+
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