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Write a short answer.
How are the bones of birds different from those of other vertebrates?
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Write a short note on annelids.
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Name the different classes of arthropods. Write one characteristic feature of each class.
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Write two characteristics of birds.
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Write two characteristics of amphibians.
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Write two characteristics of the reptiles.
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Write two characteristics of mammals
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List two notable characteristic of birds which is not found in any other group of animals?
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Why are mammals regarded as the most advanced animals?
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How will you classify animals according to the food they eat?
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List four characteristics of reptiles.
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How do fish exchange gases?
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How are the bones of birds different from those of other vertebrates?
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You are asked to classify an animal in the correct group. The animal has a soft body and arm-like tentacles. You dissect the animal and find that it has an internal shell. Is the animal a cnidarian or a mollusc? Explain your answer.
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How do warm-blooded and cold-blooded animals differ?
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Classify the given animals into different categories indicated.
Jellyfish, liver fluke, pinworm, Ascaris, tapeworm, Hydra, sea anemone into cnidarians, Platyhelminthes, and Nemathelminthes.
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Classify the given animals into different categories indicated.
Crab, millipede, butterfly, ant, scorpion, centipede, spider, lobster, moth, prawn into arachnids, crustaceans, myriapods, and insects.
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Give reason for the following.
What happens to the body temperature of a fish when the temperature of water drops?
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Give a reason for the following.
Why do adult amphibians tend to stay near water?
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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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