What is most often given a value of zero to describe an object's position on a straight line? O displacement
O reference pont
O distance
O ending location

"a.) well–developed vascular system."

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

carbon atoms, hydrogen, oxygen, and nitrogen.