click below
click below
Normal Size Small Size show me how
Cold-Vertebrates
Question | Answer |
---|---|
What are 4 characteristics that are present at some stage of development? | notochords, postanal tails, nerve cord,& gillslits |
what is the notochord? | firm flexible structure |
What does the notochord replace in many animals? | backbone |
what is the postanal tail? | muscular structure |
what animals do not lose the notochords? | tunicates, lancelates |
what is the nerve cord? | tube like structure |
What does the nerve cord change into in most fish? | spinal cord & brain |
What are gillslits? | pairs of openings |
what do they change into on fish? | gills |
what is an endoskeleton? | internal skeleton |
what is the endoskeleton made of? | bone or cartilage |
what is the function of the endo skeleton? | attach to skeleton,support,& protect |
what are vertebrae? | bone that make up the backbone |