Question

1. which of the following animal phyla contains segmented worms?

phylum annelida
phylum placozoa
phylum cnidaria
phylum porifera

Explanation:

To determine which phylum contains segmented worms, we analyze each option:

• Phylum Annelida: Annelids are known for their segmented bodies (e.g., earthworms, leeches).
• Phylum Placozoa: These are simple, non - segmented marine organisms.
• Phylum Cnidaria: Includes organisms like jellyfish and corals, which are not segmented.
• Phylum Porifera: Includes sponges, which are also non - segmented.

So, the phylum with segmented worms is Annelida.

Answer:

A. Phylum Annelida