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Biology · ANIMAL KINGDOM

हिन्दी

Which set of features uniquely describes Ctenophores (commonly known as sea walnuts or comb jellies)?

  1. Freshwater habitat, sessile, triploblastic, presence of flame cells
  2. Polyp and medusa alternation, chitinous skeleton, internal fertilization
  3. Bilateral symmetry, pseudocoelomate, organ system level, direct development
  4. Exclusively marine, eight rows of ciliated comb plates, bioluminescence, external fertilization with indirect development

Correct answer · Option 4

Exclusively marine, eight rows of ciliated comb plates, bioluminescence, external fertilization with indirect development

Explanation

Ctenophores are exclusively marine, radially symmetrical, diploblastic organisms with eight external rows of ciliated comb plates for locomotion, exhibit bioluminescence, have external fertilization, and indirect development.
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