Multiple choice

These organisms have simple bodies with a large number of holes, They take in food and oxygen via the water that flows through these holes. What are they called?

  1. Cnidarians

  2. Warms

  3. Molluscs

  4. Sponges

  5. Arthorpods

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sponges are porous organisms with numerous holes called ostia through which water flows, bringing in food and oxygen. This filter-feeding mechanism is characteristic of porifera.