Channel proteins are a type of transport protein or permease that provides a tube like opening in the plasma membrane through which particles can diffuse through. This is primarily one distinction between the 2 mechanisms or processes of simple diffusion. Facilitated diffusion and simple or passive diffusion. The use of these specific proteins.
I'd say heat, more specifically sunlight.
Why?
Because sun is the form of energy needed for plants to grow and live. Plants in turn are the form of energy needed for herbivores to live that later on turn out to be the form of energy needed by the carnivores. When these die, decomposers will be the ones to take advantage of the energy.
As you can see an ecosystem has already been formed: producers, secondary consumers, tertiary consumers or decomposers.
Hope it helped,
Happy homework/ study/ exam!
Firstly they are not membranes and they are villi's which increase the surface area during digestion
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"<em><u>
Earth or geoscience</u></em>
" investigates the interactions among the atmosphere, hydrosphere, biosphere, and geosphere.</h2>
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.
