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Question
Given below are groups of animals, and their characteristics features. Some of the features are incorrect. Identify the odd one out in each.
| Group | Characteristic features | Odd one out |
| Porifera | porous animals, have tentacles, fixed to surface | |
| Amphibia | cold-blooded, lungs in adults, scaly skin | |
| Aves | cold-blooded, wings, feathers, bones with large air spaces | |
| Pisces | live in water, scaly skin warm-blooded, fins for swimming |
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Solution
| Group | Characteristic features | odd one out |
| Porifera | porous animals, have tentacles, fixed to surface | have tentacles |
| Amphibia | cold-blooded, lungs in adults, scaly skin | scaly skin |
| Aves | cold-blooded, wings, feathers, bones with large air spaces | cold-blooded |
| Pisces | live in water, scaly skin, warm-blooded, fins for swimming | warm-blooded |
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