The movement of high-energy electrons down the electron transport chain leads to the 1. electrons oxidizing existing molecules of water.

2. formation of a proton gradient.

3. mitochondrial membrane becoming heavily electrically charged.

4. electrons oxidizing existing molecules of carbon dioxide.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

i am sorry but i need more information and a picture.