Multiple choice

Which organism represents the phyla, whose members lack mouth and anus?

  1. Spongilla

  2. Hydra

  3. Planaria

  4. Ascaris

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

Sponges (Porifera) lack a digestive system, including a mouth and anus. They filter water through pores to obtain nutrients.