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| 91. |
In syconoid structure the radial and incurrent canals differ in being lined with: |
| A. |
Choanocytes |
B. |
Archaeocytes |
| C. |
Chromocytes |
D. |
Mesocytes |
Answer: Option A
Explanation:
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| 92. |
Incurrent canals in syconoid sponge open into radial canals with the help of: |
| A. |
Prospyles |
B. |
Apopyles |
| C. |
Both (a) & (b) |
D. |
None of these |
Answer: Option A
Explanation:
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| 93. |
Who places sponges alongwith plants in group 'Zoophyta': |
| A. |
Linnaeus |
B. |
Ellis |
| C. |
Aristotle |
D. |
Lamarck |
Answer: Option A
Explanation:
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| 94. |
Excretory waste in sponges is: |
| A. |
Ammonia |
B. |
Urea |
| C. |
Uric acid |
D. |
None of these |
Answer: Option A
Explanation:
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| 95. |
Respiration in sponges: |
| A. |
Occurs when the water current comes in an goes out |
B. |
Occurs anaerobically |
| C. |
Occurs with the help of gills like many aquatic animals |
D. |
Does not occur at all |
Answer: Option A
Explanation:
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| 96. |
Fertilization in sponges is by cross method because: |
| A. |
Ova mature first |
B. |
Sperms mature first |
| C. |
Sponges are urusexual |
D. |
None of these |
Answer: Option A
Explanation:
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| 97. |
Sex cells in sponges are formed by transformation of |
| A. |
Choanocytes |
B. |
Archaeocytes |
| C. |
Both (a) & (b) |
D. |
None of these |
Answer: Option C
Explanation:
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| 98. |
Olynthus in sponges is the name of: |
| A. |
A larval stage |
B. |
A type of cell |
| C. |
A skeletal element |
D. |
A type of canal system found in the adult stage of few sponges |
Answer: Option A
Explanation:
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| 99. |
Olynthus is larval stage of: |
| A. |
Scypha |
B. |
Leucosolenia |
| C. |
Spongilla |
D. |
None of these |
Answer: Option A
Explanation:
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| 100. |
Ornamental sponges belong to the group of: |
| A. |
Calcareous sponges |
B. |
Glass sponges |
| C. |
Demospongiae |
D. |
None of these |
Answer: Option B
Explanation:
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