Invertebrate Phyla Quiz

Which phylum includes flatworms with a gastrovascular cavity and a single opening for digestion?

• Phylum Mollusca

• Phylum Nematoda

• Phylum Platyhelminthes

• Phylum Annelida

Which phylum consists of roundworms with a pseudocoelom and a complete digestive system?

• Phylum Platyhelminthes

• Phylum Nematoda

• Phylum Annelida

• Phylum Arthropoda

Which phylum has segmented worms with a closed circulatory system and metanephridia for excretion?

• Phylum Cnidaria

• Phylum Annelida

• Phylum Nematoda

• Phylum Platyhelminthes

Which class of Platyhelminthes includes parasitic tapeworms?

• Turbellaria

• Cestoda

• Trematoda

• Monogenea

Which roundworm is widely used as a model organism in genetics and developmental biology?

• Ascaris lumbricoides

• Caenorhabditis elegans

• Enterobius vermicularis

• Trichinella spiralis

Which class of Annelida includes earthworms important for soil aeration and nutrient recycling?

• Gastropoda

• Hirudinea

• Polychaeta

• Oligochaeta

Which marine annelid is known for its bristled segments?

• Aphrodite

• Nereis

• Sabellaria

• Eunice

Which annelid has medical applications due to its anticoagulant properties?

• Lumbricus terrestris

• Nereis

• Perinereis

• Hirudo medicinalis