What are dolphins made/ what support structures do they have?

Because of its structure the cell membrane is known as a phospholipid ? a. bilayer b. molecule c. fluid d. barrier

What is the 77 element on the periodtic table

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?