I think it’s c on a sunday in two weeks
Answer:
1 All living organisms are made up of one or more cells.
2 The cell is the basic structural and functional unit of life.
3 Cells arise from pre-existing cells.
Explanation: if this is not correct plz tell me and ill do some more research but im pretty sure its correct.
All cells are not the same because each cells conduct different functions. Each cells have a specific task.
Answer: C. The sign of the enthalpy of the reaction reverses.
Explanation: Enthalpy of a reaction is the net heat absorbed or released during a chemical reaction.It is represented by
. It is negative for exothermic reactions in which heat is released and is positive for endothermic reactions in which heat is absorbed.
When a chemical reaction is reversed the heat of the reaction changes its sign.

The decomposition of calcium carbonate is an endothermic reaction as heat is required to break the bonds and thus energy is absorbed.

When the reaction is reversed, the reaction becomes exothermic as now bonds are getting formed and energy is released.