Multiple choice

Which of the following combinations of phylum and description is incorrect?

  1. Echinodermata – bilaterial and radial symmetry, coelom from archenteron

  2. Nematode – roundworms, pseudocoelomate

  3. Cnidaria – radial symmetry, polyp and medusa body forms

  4. Porifera – gastrovascular cavity, coelomate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Option D is incorrect because Porifera (sponges) do NOT have a gastrovascular cavity - they have a unique water canal system with ostia, spongocoel, and osculum for filter feeding. Also, sponges are NOT coelomate - they have no true body cavity. The other options are correct: Echinoderms have bilateral larval and radial adult symmetry, Nematodes are roundworms with pseudocoelom, Cnidarians have radial symmetry with polyp/medusa forms.

Keep practicing — related questions