Home › CBSE Class 11 › biology › Animal Kingdom — Basis of Classification + Major Phyla (Porifera through Chordata) › In SPONGES (Porifera), the level of body organis…
In SPONGES (Porifera), the level of body organisation is:
AOrgan level (tissues grouped into organs)
BCellular level (cells arranged as loose aggregates, with some division of labour)
COrgan-system level
DTissue level (cells with same function arranged into tissues)
Answer & Solution
Correct answer: B. Cellular level (cells arranged as loose aggregates, with some division of labour)
Sponges show CELLULAR level of organisation — loose cell aggregates, no tissues. Coelenterates show tissue level; Platyhelminthes show organ level; Annelids onwards show organ-system level.
Related questions
In Mollusca, the file-like rasping organ used for feeding is called:Bioluminescence (light emission) is most well-marked in:Identify the phylum where animals are MOSTLY HERMAPHRODITE (eggs and sperms in the same inHEMICHORDATA was earlier placed under Chordata but is now classified as a separate phylum Identify the chordate features that distinguish them from non-chordates.The WATER VASCULAR SYSTEM (for locomotion, food capture and transport, respiration) is theFLAME CELLS (for osmoregulation and excretion) are characteristic of:Metameric segmentation (true serial body segmentation with repetition of organs) character