When scientists are classifying organisms, what do they not use?

A sea worm will emerge out of its tube during high tide to find food. What type of adaptation is this?

A clapper rail (bird) has a long bill to probe for food in the mud. What type of adaptation is the long bill?

An angler fish produces light to attract prey. Producing light is what type of adaptation

Ribbed Mussels have a shell to prevent from dehydration. What type of adaptation is the shell?

What fish fin is used to propel a fish forward?

Which adaptation allows gas to move in and out of a fish's blood?

Which adaptation allows a fish to detect vibration and pressure?

What fish adaptation helps fish to fend off parasites?

What process helps keep a consistent amount of salt and water in the fish's blood?