14 The Pardee Papers | No. 15 | August 2011. farmers in the donor countries fearing competition from African farmers was. one of the key drivers of the fall in Overseas Development Assistance (ODA) support for agriculture (World Bank 2008).
The electron transport chain is a system of molecules through which electrons are transferred to generate ATP. It has an important role in both photosynthesis and cellular respiration. ETS in photosynthesis. In photosynthesis, when you are absorbed in photosystem 2, electrons are energized.here are a number of molecules that consists an electron transport chain. Most of these molecules are proteins, built into the inner membrane of mitochondria of eukaryotic cells and the plasma membrane of aerobically respiring prokaryotes.
But as organisms increase in size, they need a specialized transport system to exchange substances between the internal environment and the external environment. Interestingly enough, osmosis and diffusion are still the important mechanisms at the cellular level. + 60 others found this useful. Helena Trang.ut as organisms increase in size, they need a specialized transport system to exchange substances between the internal environment and the external environment. Interestingly enough, osmosis and diffusion are still the important mechanisms at the cellular level. + 60 others found this useful. Helena Trang.