- A Cellular level
- B the organ system level
- C a tissue-grade level
- D only organ level type
Correct answer: A. Cellular level
Explanation: Sponges show only the cellular level of organisation.
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.