Please help me on this and don't use me as points.

Which sequence correctly shows the path of carbon dioxide during repiration?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water