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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Animals which possess collar cells and an osculum as characteristic features belong to phylum:

Options

  1. ACnidaria
  2. BEchinodermata
  3. CCtenophora
  4. DPorifera

Correct answer

D. Porifera

Step-by-step solution

Members of phylum Porifera are commonly known as sponges. Sponges have a water transport or canal system. Water enters through minute pores (ostia) in the body wall into a central cavity, spongocoel, from where it goes out through the osculum. Choanocytes or collar cells line the spongocoel and the canals.

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