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    NEET 2026 Preparation Tips for Chemistry, Biology and Physics

    Phylum Porifera and its Morphological Features MCQ - Practice Questions with Answers

    Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

    Quick Facts

    • Physiology of Porifera is considered one of the most asked concept.

    • 14 Questions around this concept.

    Solve by difficulty

    Digestion in Porifera is

    Concepts Covered - 1

    Physiology of Porifera

    Digestion in Porifera

    • Sponges lack a digestive system. 
    • The nutrition is performed by choanocytes that trap the phytoplanktons and digest them through phagocytosis. 
    • Hence, digestion is intracellular. 
    • The amoebocytes transfer food from choanocytes to other cells. 
    • The pinacocytes digest larger plankton. 

    Respiration in Porifera

    • Sponges do not have a respiratory system. 
    • The exchange of gases occurs via diffusion across the cell surface. 
    • The oxygen is diffused in from water current and carbon dioxide diffuses out. 

    Excretion in Porifera

    • The excretory system is absent. 
    • Nitrogenous waste is disposed from the cells through the process of diffusion. 
    • Ammonia is the principal excretory waste.
       

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    Physiology of Porifera

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