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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
Answer the following question.
Reptiles are known for having three-chambered heart. Which animal shows a near four-chambered condition in reptiles?
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Pinna is part of the external ear and it is found in mammals. Do aves and reptiles show external ear in any form?
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Lower Phyla like Arthropods and Cnidarians show metamorphosis. Is it also found in any class of Phylum Chordata?
Draw a neat labelled diagram.
Amphioxus
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.
Identify the animal given in the picture and write features of its phylum/class.
