| 16. | Embryo of Taenia is inside egg and contain chitinous hook that are in number |
| a. | 6 |
| b. | 7 |
| c. | 5 |
| d. | 9 |
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Answer: (a).6
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| 17. | An example of marine colonial that exhibits alternation of generations is |
| a. | star fish |
| b. | Obelia |
| c. | jelly fish |
| d. | sea urchin |
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Answer: (b).Obelia
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| 18. | Skeleton of sponges is composed of needle-like structures called |
| a. | spicules |
| b. | ostia |
| c. | osculum |
| d. | spongecoel |
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Answer: (a).spicules
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| 19. | Tasmania wolf found in Australia belong to class metatheria and termed as |
| a. | marsupials |
| b. | reptiles |
| c. | mammals like reptiles |
| d. | amphibians |
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Answer: (a).marsupials
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| 20. | Glandular epithelia envelope which secretes calcareous shell is called |
| a. | chitin |
| b. | exoskeleton |
| c. | mantle |
| d. | core |
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Answer: (c).mantle
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