Which phylum does not show tissue level of organization?
Correct answer: C. Porifera
- A. Nematoda
- B. Coelenterata
- C. Porifera
- D. Echinodermata
Explanation
Phylum Porifera, which includes sponges, has no tissue level organization. Sponges are the simplest animals and are characterized by their lack of true tissues, organs, and body symmetry. Instead, they have a porous body with numerous openings called ostia, which allow water to flow through the sponge and filter out food particles.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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