Status of Parazoa

What was the need to create Parazoa against Porifera when the latter existed? (UPSC 2011, 15 Marks, )

जब पोरीफेरा मौजूद था तो उसके खिलाफ पराज़ोआ बनाने की क्या आवश्यकता थी? (What was the need to create Parazoa against Porifera when the latter existed?)
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Explain the status of Protista and Parazoa giving their characteristics with suitable examples. (UPSC 2007, 60 Marks, )

प्रोटिस्टा और पराज़ोआ की स्थिति को उनके लक्षणों के साथ उपयुक्त उदाहरण देते हुए समझाएं। (Explain the status of Protista and Parazoa giving their characteristics with suitable examples.)
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Protista and Parazoa and their status. (UPSC 2004, 20 Marks, )

प्रोटिस्टा और पराज़ोआ और उनकी स्थिति। (Protista and Parazoa and their status.)
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