Question

why would someone say the worms of the phyla annelida are more advanced than the worm of the platyhelminthes?

Answer 1

Answer:

Most people are familiar with earthworms found in garden soil. Although many different kinds of animals are commonly lumped together as “worms,” there are several distinct phyla that fit the category. Worms are typically long, thin creatures that get around efficiently without legs. The different phyla of worms display a great range in size, complexity, and body structure. Flatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian. Roundworms (phylum Nematoda) have a slightly more complex body plan. Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans. A study of worms can illuminate a possible history of how some organ systems and body features evolved.

Explanation:

Answer 2

Phylum Annelida is more advanced than Platyhelminthes

Explanation:

Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans.

• Example: Earthworms, Leeches
• Presence of coelom.
• A circulatory system to distribute blood and oxygen.
• A developed gut that runs from one end of the body to the other.

Flatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian.

• Example: Tapeworms, Fasciola
• Absence of coelom,
• No body cavity, hence flat.