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प्रश्न
Fill in the blank.
Cnidarians have ................ symmetrical body.
उत्तर
Cnidarians have radially symmetrical body.
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संबंधित प्रश्न
Select the most appropriate answer.
Bones with large air cavities are present in
a. cnidarians.
b. fish.
c. annelids.
d. birds.
Fill in the blank.
Vertebrates which spend a part of their life on land but reproduce in water are called ..................
Answer in detail.
List four characteristics of reptiles.
Answer in detail.
How do warm-blooded and cold-blooded animals differ?
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 |
Which ones of the following animals are invertebrates?
Housefly, Silverfish, Trout, Jellyfish, Whale, Penguin, Lizard and Sponge
Mention any one major similarity and one major difference in the following pairs of an animal:
Snakes and Earthworms
Karl Von Linne was involved with which branch of science?
Bones with air cavities ate seen in ______.
In mammals, the testis is enclosed by ______.
