the center of the solar system is the sun
Objective, since objectivity means the evidence is not biased in any way.
Answers:
1) Water
2) NADH
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1) Water donates the initial electron in photosynthesis. The process of photolysis splits the water into H+ and O2 (oxygen, a byproduct of photosynthesis), and releases electrons which are taken up by photosystem II.
2) The electron transport chain is in the last step of cellular respiration, oxidative phosphorylation. NADH donates the electrons, which are used to pump H+ against the gradient into the intermembrane space of the mitrochondria. These H+ flow back across the membrane through ATP synthase to generate ATP.
Mammals are unique in possessing a diaphragm to pull O2 into the lungs. The voice box is the larynx. Both the digestive and respiratory tracts are shared by the pharynx. Pseudostratified ciliated columnar is the epithelial tissue that is destroyed by smoking but can regenerate if smoking stops. The role of surfactant is to reduce surface tension. The primary role of hemoglobin is to carry oxygen. The inflammation of bronchi is called bronchitis.
