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| 21. |
Which of these is a blancing sense organ: |
| A. |
Statocyst |
B. |
Osphradium |
| C. |
Nuchal organ |
D. |
Antenna |
Answer: Option A
Explanation:
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| 22. |
Bivalve shell is found in: |
| A. |
Lamellidens |
B. |
Pila |
| C. |
Cockroaches |
D. |
None of these |
Answer: Option A
Explanation:
|
| 23. |
Head is not found in: |
| A. |
Pila |
B. |
Lamellidens |
| C. |
Cockroach |
D. |
Nereis |
Answer: Option B
Explanation:
|
| 24. |
Gills are used as brood pouch in: |
| A. |
Pila |
B. |
Lamellidens |
| C. |
Star-fish |
D. |
None of these |
Answer: Option B
Explanation:
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| 25. |
Ctenidia are used for food collection in: |
| A. |
Lamellidens |
B. |
Pila |
| C. |
Tadpole |
D. |
Fishes |
Answer: Option A
Explanation:
|
| 26. |
Gill, in Lamellidens have function of: |
| A. |
Respiration only |
B. |
Food collection only |
| C. |
Both (a) & (b) |
D. |
None of these |
Answer: Option C
Explanation:
|
| 27. |
Foot of Lamellidens is used for: |
| A. |
Walking |
B. |
Anchoring |
| C. |
Swimming |
D. |
All of these |
Answer: Option D
Explanation:
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| 28. |
Foot in Pila is used for: |
| A. |
Creeping |
B. |
Swimming |
| C. |
Burrowing |
D. |
All of these |
Answer: Option A
Explanation:
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| 29. |
Tentacles is Pila are: |
| A. |
Single |
B. |
One pair |
| C. |
Two pairs |
D. |
Absent |
Answer: Option C
Explanation:
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| 30. |
Shell of pilla is: |
| A. |
Bivalved |
B. |
Globular and coiled |
| C. |
Cup like |
D. |
None of these |
Answer: Option B
Explanation:
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