Question

identify each invertebrate by matching it with its characteristics.
unsegmented cylindrical worm with a pseudocoelom
animals with a mantle, foot, and sometimes a shell
animals with radial symmetry and stinging cnidocyte cells
sessile, filter - feeding animals with an asymmetrical body plan
animals with jointed legs and an exoskeleton made out of chitin
worm - like animal without a body cavity (no coelom)
marine animals with radial symmetry and an

1. arthropods
2. mollusks
3. roundworms
4. cnidarians
5. flatworms
6. sponges
7. echinoderms

Explanation:

• Roundworms (Nematodes): They are unsegmented cylindrical worms with a pseudocoelom.
• Mollusks: Have a mantle, foot, and sometimes a shell.
• Cnidarians: Possess radial symmetry and stinging cnidocyte cells.
• Sponges: Sessile, filter - feeding animals with an asymmetrical body plan.
• Arthropods: Have jointed legs and an exoskeleton made of chitin.
• Flatworms (Platyhelminthes): Worm - like animals without a body cavity (no coelom).

Answer:

• unsegmented cylindrical worm with a pseudocoelom: 3. Roundworms
• animals with a mantle, foot, and sometimes a shell: 2. Mollusks
• animals with radial symmetry and stinging cnidocyte cells: 4. Cnidarians
• sessile, filter - feeding animals with an asymmetrical body plan: 6. Sponges
• animals with jointed legs and an exoskeleton made out of chitin: 1. Arthropods
• worm - like animal without a body cavity (no coelom): 5. Flatworms