Cartilaginous fish do not contain any bones - their skeleton is made up of cartilage.
Answer:
Is the Atmosphere always the same? Explain. No, it is Constantly changing w/ Gases Moving in and out of Living things, the Land and Water. ... They are Created when the Downward Force of Air is Greater than the Upward Force of Moving Air and Air Molecules.
A hollow sphere and that has ellipsoid, tube, and many other shapes. it has 60 carbon atoms, this form of carbon is named in recognition.