Which statements correctly describe the human skeletal system? O A. The skeletal system produces red blood cells.
B. Once made, bones become solid structures.
OC. Adult bones are made of non-living materials only.
D. There are many kinds of joints.
OE. Joints are bones that can bend.

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.