What is the main skeletal difference between salt water eels and lamprey fish besides the jaw

The main skeletal difference between water eels and lamprey is that the body of lamprey lacks bones and has a skeleton made up of cartilage. On the other hand, the skeleton of salt water eels is made up of bones.

Other differences between the two fishes include :

the correct option is option d

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.