NEET BIOLOGY

Detailed explanation-1: -Sponges have cellular-level organization, meaning that that their cells are specialized so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells.

Detailed explanation-2: -In sponges, the cells are arranged as loose cell aggregates, i.e., they exhibit cellular level of organisation.

Detailed explanation-3: -In the Animal Kingdom, sponges are the only group of animals that exhibit cellular level of organisation.

Detailed explanation-4: -Sponges belong to the phylum Porifera. They have a cellular level of organization and lack tissues, thus being multicellular organisms.

Detailed explanation-5: -2. Phylum Porifera which includes sponges has the basic cellular level of organization.