Question

1. what phylum do earthworms belong to?

platyhelminthes
porifera
annelida
cnidaria

Explanation:

To determine the phylum of earthworms, we analyze each option:

• Platyhelminthes includes flatworms (e.g., tapeworms, planarians), not earthworms.
• Porifera includes sponges, which are simple aquatic organisms, not earthworms.
• Annelida consists of segmented worms, and earthworms are segmented worms with a body divided into rings (annuli), so they belong here.
• Cnidaria includes organisms like jellyfish and corals with stinging cells, not earthworms.

Answer:

C. Annelida