What are polychaetes?
Q: What are polychaetes?
A: Polychaetes are a class of annelid worms found in marine environments.
Q: How many known species of polychaetes are there?
A: There are more than 10,000 known species of polychaetes.
Q: How old are polychaetes?
A: Polychaetes are ancient animals that date back to 518 million years ago.
Q: Where were polychaetes first found in fossils?
A: Polychaetes were first found in the early Cambrian fossil beds of Sirius Passet in Greenland.
Q: What are the fleshy protrusions on each body segment of polychaetes called?
A: The fleshy protrusions on each body segment of polychaetes are called 'parapodia'.
Q: What are the bristles on the parapodia of polychaetes made of?
A: The bristles on the parapodia of polychaetes are made of chitin.
Q: What are some common species of polychaetes?
A: Some common species of polychaetes are the lugworm and the clam worm Nereis (also known as the 'sandworm').
