Answer:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs.
Answer: B) calcium nitrate
Thomson's model included Protons and Electrons. His model is referred to as 'Plum Pudding' because of it.
This is not chemistry but it's A, off top.