Answer: Gemmules.
- A Cysts
- B Nymphs
- C Gemmules
- D Larvae
Correct answer: C. Gemmules
Explanation: Under stress, freshwater sponges form gemmules - resistant internal buds that grow into new sponges when conditions improve.
Moving across the animal phyla, body organisation becomes progressively more complex: from no symmetry and cellular organisation (Porifera) through radial/diploblastic (Cnidaria), bilateral/acoelomate (Platyhelminthes), pseudocoelomate (Nematoda), to a true coelom with full organ systems (Annelida and beyond).
Concept context
Phylum-level classification of the animal kingdom from Porifera to Chordata, based on body symmetry, coelom, and segmentation. One of the most example-heavy chapters for NEET.