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प्रश्न
Find the odd one out. Give reason.
snail, oyster, earthworm, octopus
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उत्तर
earthworm: earthworm is an annelid whereas the rest three are molluscs.
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संबंधित प्रश्न
Fill in the blank.
.................. do not have a backbone, while vertebrates have it.
Select the most appropriate answer.
Organs of excretion in annelids are
Answer in detail.
Write two characteristics of amphibians.
Answer in detail.
List four characteristics of reptiles.
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 |
Mention any one major similarity and one major difference in the following pairs of an animal:
Cuttlefish and Dogfish
Write zoological names of roundworm.
On the basis of characteristics given below, name the phyla: Soft bodies, muscular foot, calcareous shell and presence of mantle.
The notochord extends throughout the entire length of the body is ______.
List the integumentary glands of mammals.
