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

Phylum Porifera (sponges) are the only animals that lack both a mouth and an anus. They feed through specialized cells called choanocytes that capture food particles from water flowing through their pores. Spongilla is a freshwater sponge.