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प्रश्न
The skeletal framework of Porifera is ______.
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उत्तर
The skeletal framework of Porifera is spicules.
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संबंधित प्रश्न
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Fill up the blank spaces appropriately
| Phylum/Class | Excretory Organ | Circulatory Organ | Respiratory Organ |
| Arthropoda | Lungs/Gills/ Tracheal System | ||
| Nephridia | Closed | Skin/parapodia | |
| Metanephridia | Open | ||
| Amphibia | Closed | Lung |
