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Biology · ANIMAL KINGDOM

हिन्दी

Cnidarians exhibit a central body cavity with a single opening on a elevated structure. Name this opening and structure, and identify the type of digestion present in them.

  1. Osculum; digestion is strictly intracellular
  2. Ostium; digestion is only extracellular
  3. Single opening (mouth) on hypostome; digestion is both extracellular and intracellular
  4. Anus on blastopore; digestion is absent

Correct answer · Option 3

Single opening (mouth) on hypostome; digestion is both extracellular and intracellular

Explanation

Cnidarians have a central gastro-vascular cavity with a single opening, mouth on hypostome. Digestion is both extracellular and intracellular.
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