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प्रश्न
Write a short answer.
How are the bones of birds different from those of other vertebrates?
उत्तर
The bones of birds have large air cavities (are hollow) and hence are light. This enables them to fly. On the other hand, bones of other vertebrates are dense and solid and form a _ heavy skeleton.
APPEARS IN
संबंधित प्रश्न
Tick (✓) the appropriate answer:
Identify the animal which is not an Arthropoda
Name one example of the animal which shows the following characteristics:
Can live in water as well as on land:
Fill in the blank.
................. is an example of a crustacean.
Fill in the blank.
The animals without a backbone whose body is soft and often covered by a hard shell are .................
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
insects and crustaceans
Answer in detail.
Write two characteristics of the reptiles.
Answer in detail.
How will you classify animals according to the food they eat?
Mention any one major similarity and one major difference in the following pairs of an animal:
Snakes and Earthworms
Name the phyla to which following animal belongs: Starfish
