What is the function of a cell wall (A) to protect and support the cell
(B) to perform different functions in each cell
(C) to prevent water from passing through the cell
(D) to prevent oxygen from entering the cell

How do you know when a chemical reaction has occurred

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!