What do scanning electron microscopes and transmission electron microscopes have in common? both generate three-dimensional images. both offer magnification to the atomic level. both are used to view the parts of a cell. both require a vacuum.

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.