What is the energy source which runs the electron transport chain?

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

The ruiz family is exchanging euros for us dollars. the exchange rate is 1 euro equals 1.35261 usd. since the ruiz family knows that usd are stated to the nearest hundredth of a dollar, they used the conversion ratio