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4. Which of the following combinations is incorrect?
- Nematoda- roundworms, pseudocoelomate
- Calcarea- gastrovascular cavity, coelom present
- Echinodermata- coelom present, bilateral symmetry
- Platyhelminthes- gastrovascular cavity, flatworms, acoelomate
(b) Calcarea- gastrovascular cavity, coelom present
Answer & Explanation
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5. Flame cells are the excretory structures for
- Annelida
- Coelenterates
- Platyhelminthes
- Echinodermata
(c) Platyhelminthes
Answer & Explanation
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6. Phylum Porifera is classified based on
- Branching
- Symmetry
- Spicules
- Reproduction
(c) Spicules
Answer & Explanation
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