How are proteins used for active transport different from those used for facilitated diffusion

The combining form leuk/o means red true or false

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.

Why is it important that each contour line represents the same amount of gain or loss in elevation