Phoronid worms
A) Are relatively large and usually over 30 cm in length
B) Are tube-dwelling marine animals
C) Are most common in deep tropical oceans near thermal vents
D) Spend a lot of time scavenging across the sea floor
E) Are a serious threat to oyster beds

Question

Quizplus · Accepted Answer

Phoronid worms are tube-dwelling marine animals, which means they live inside protective tubes they build from their own secretions. The other choices are incorrect. While some species of phoronid worms can grow up to 50 cm in length, not all do, making A incorrect. They are found in a variety of marine environments, not just deep tropical oceans near thermal vents, making C incorrect. While phoronid worms do scavenge for food, they do not spend a lot of time scavenging across the sea floor, making D incorrect. Finally, phoronid worms are not a serious threat to oyster beds.

Phoronid Worms