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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:
The unicellular organism causing malaria
Fill in the blank.
.................. do not have a backbone, while vertebrates have it.
Select the most appropriate answer.
The body temperature of warm-blooded animals
Fill in the blank.
The backbone of vertebrates is made up of a number of small bones called .....................
Match the following.
| Group | Characteristics | ||
| 1. | Molluscs | a. | Feed milk to young ones, warm-blooded |
| 2. | Spongers | b. | bag-like body with tentacles around the opening |
| 3. | Flatworms | c. | fins, gills and cold-blooded |
| 4. | mammals | d. | body with large opening and many small pores all over |
| 5. | Fish | e. | jointed legs, exoskeleton |
| 6. | cnidarians | f. | have only one opening |
| 7. | arthropods | g. | hard shell, soft body |
| h. | cylindrical, unsegmented body with mouth at one end and anus at the posterior end |
Differentiate between
aves and mammals
Answer in detail.
Write two characteristics of amphibians.
Mention any one major similarity and one major difference in the following pairs of an animal:
Wall lizard and Frog
Bones with air cavities ate seen in ______.
Mention two special features of mammals.
