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Botany and Branches
Classification of Plant Kingdom
Micro Organism
Taxonomy of Angiosperm
Morphology of Plant
Plant Physiology
Plant Disease
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Plant Tissue
Classification of Animal Kingdom
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Biology miscellaneous
  1. Collar cells occur in
    1. sponges
    2. hydra
    3. sandworm
    4. starfish
Correct Option: A

Collar cells occurs in sponges and located at the anterior end of each choanocyte.


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