Research the cell theory. What does the cell theory propose? Describe a hypothetical observation for each part of the cell theory that would cause it to change. Why have these parts remained unchanged as of today?

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.