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प्रश्न
Fill in the blank.
Annelids have special organs of excretion called ..............
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उत्तर
Annelids have special organs of excretion called nephridia.
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संबंधित प्रश्न
Give two examples of Arthropods:
Fill in the blank.
...................... live in the digestive tract of many vertebrates including human beings.
Fill in the blank.
A ................. has an external coiled shell.
Answer in detail.
Write two characteristics of mammals
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 |
Write zoological names of roundworm.
Which group of animals have following characteristics: Multicellular body not organized into tissues.
Give an account on the classification of invertebrates with few general features and examples.
Giving birth to young ones is described as ______.
Why are eggs of reptiles covered with shells unlike the eggs of amphibians?
