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प्रश्न
Answer the following question.
Crab and Snail both have a protective covering. Is it made up of the same material?
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उत्तर
No, the protective covering is not made up of same material in crab and snail. The protective covering of crabs is made up of chitin and that of snails is made up of calcium carbonate.
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संबंधित प्रश्न
Choose the correct option.
In Ascaris, ___________.
The circulatory system has evolved from open to closed type in Animal kingdom. Which Phylum can be called first to represents closed circulation?
Answer the following question.
Fish and frog can respire in water. Can they respire through their skin? If yes, why do they have gills?
Answer the following question.
Lower Phyla like Arthropods and Cnidarians show metamorphosis. Is it also found in any class of Phylum Chordata?
Draw a neat labelled diagram.
Aurelia
Draw a neat labelled diagram.
Catla
Match the following.
| Phylum | Characters |
| i. Annelida | a. Tube feet |
| ii. Mollusca | b. Ostia |
| iii. Ctenophora | c. Radula |
| iv. Porifera | d. Parapodia |
| v. Echinodermata | e. Comb plates |
Identify the animal given in the picture and write features of its phylum/class.
Identify the animal given in the picture and write features of its phylum/class.
Identify the animal given in the picture and write features of its phylum/class.
