Multiple choice

Which of the following is not a feature of Porifera?

  1. Contain pores

  2. No distinct internal organs

  3. No muscle or nerve tissue

  4. A mouth and digestive system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Porifera (sponges) are the simplest animals; they lack true tissues, organs, a mouth, and a digestive system, relying on water flow through pores for feeding.

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