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प्रश्न
Write a short answer.
Name the special organs of excretion in annelids?
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उत्तर
Annelids have a special organ of excretion called nephridia.
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संबंधित प्रश्न
Fill in the blank.
Vertebrates which spend a part of their life on land but reproduce in water are 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
amphibians and Pisces
Answer in detail.
How are the bones of birds different from those of other vertebrates?
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 |
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Pigeon - Feathers, wings, hair
Write two main characters of the following animal and name the phylum it belongs to: Starfish
What is the name of the bone which is filled with air?
______ is the unique characteristic feature of mammals.
What is the sub-phylum of prochordates?
