At a fundamental level, water provides electrons to replace those removed from chlorophyll in photosystem II. Also, water produces oxygen as well as reduces NADP to NADPH (required in the Calvin cycle) by liberating H+ ions
During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).
Water also has another important role of being an electron feeder. In the process of photosynthesis, water provides the electron that binds the hydrogen atom (of a water molecule) to the carbon (of carbon dioxide) to give sugar (glucose).
Water acts as a reducing agent by providing H+ ions that convert NADP to NADPH. Since NADPH is an important reducing agent present in chloroplasts, its production results in a deficit of electrons, resulting from oxidation of chlorophyll. This loss of electron must be fulfilled by electrons from some other reducing agent. Photosystem II involves the first few steps of the Z-scheme (the diagram of the electron transport chain in photosynthesis) and therefore a reducing agent that can donate electrons is required to oxidize chlorophyll, which is provided by water (acting as a source of electrons in green plants and cynobacteria). Hydrogen ions thus released create a chemical potential (chemiosmotic) across the membrane that finally results in synthesis of ATP. Photosystem II is the primary known enzyme that acts as catalyst in this oxidation of water.
Answer: True. Factors that determine the per capita rate of increase of a population include the age of breeding and the number of offspring produced each year.
Explanation: Per capita rate, refers to the amount of individuals that are increasing the population rate. Depending on the amount of people who are of age to have children, will determine the rate at which the population is set to grow.
Proprietary colonies were governed by a lord proprietor. The authority and power exerted by the lord proprietor came from a royal charter.
Maryland was one of the proprietary colonies of the British Empire between 1632 and 1776. Maryland´s first lord proprietor was Cecil Calvert,second Baron Baltimore.
The 1957 launch of Sputnik and subsequent Russian firsts in space convinced many U.S. policymakers that the country had fallen dangerously behind its Cold War rival. Consecutive U.S. administrations invested in education and scientific research to meet the Soviet challenge.
