“The theory of endosymbiosis provided us with a huge insight into the evolution of eukaryotic life; without this unlikely random event, we as a species would not have evolved to consider it.”

That phrase is definitely a bit outdated, but I think it does more good than harm! Always a good thing to have young scientists interested in the coolest organelle ever

Delta p = the entire potential
Delta psi = electric potential
Delta pH = diffusion potential

Delta p = delta psi + delta pH