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प्रश्न
Answer in detail.
How are the bones of birds different from those of other vertebrates?
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उत्तर
The bones of the birds are hollow and filled with large air cavities. This makes their skeleton light and enables them to fly. On the other hand, bones of other vertebrates are dense and solid and form a heavy skeleton.
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संबंधित प्रश्न
Tick (✓) the appropriate answer:
Identify the aquatic animal with scaly skin which breathe with gills
Fill in the blank.
................. have three pairs of jointed legs.
Differentiate between
amphibians and Pisces
State if the following statement is true or false. Correct the statement if it is false.
Fish have fins, scales and they breathe through gills.
Answer in detail.
Why are mammals regarded as the most advanced animals?
Answer in detail.
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.
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 |
Name the various phyla of non-chordates with two examples.
On the basis of characteristics given below, name the phyla: Body cylindrical, segmented, coelomate.
Giving birth to young ones is described as ______.
