This would be an example of an energy pyramid. In an energy pyramid, the next trophic level gets only 10% of the energy from the level below it. In this example, lets say that there is 100 energy in the eggs. Then, 10% of that goes to the snake, so the snake gets 10. Lastly, the hawk eats the snake, so the hawk gets 1.
First, the electron
transport chain transfer the electrons from electron donors to electron
acceptors using both reduction and oxidation reactions.
Next, the energy
released in these reactions is captured as an electrochemical proton gradient
that triggers the synthesis of ATP synthase and produce adenosine triphosphate
(ATP) from ADP and phosphate group in the process called chemiosmosis.
Lastly, ATP stores
energy chemically in the form of highly strained bonds and together, the
electron transport chain and chemiosmosis makes up the oxidative
phosphorylation which is found in the inner mitochondrial membrane.
Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. (At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion. Eukaryotic cells containing mitochondria then engulfed photosynthetic prokaryotes, which evolved to become specialized chloroplast organelles).