This quote shows that photosynthesis is the most essential part of the exchange between humans and plants because it produces all the resources we need.
In the next pages, we shall look at the types and importance of forests, the problem of deforestation and its' effects, as well as what we can do to minimise the consequences.
Photosynthesis is not an immediate process. The entire chain of events will not occur as soon as the sunlight hits the leaves. Some of it will actually occur in darkness when there is no visible sunlight. Photosynthesis is split into two separate parts referred to light dependent and light independent reactions. The light dependent reaction happens when sunlight is captured and used to begin the process, resulting in the creation of a molecule known as ATP. ATP is a free energy containing molecule and is produced through a chain of steps starting when chlorophyll absorbs light energy. The light independent reaction creates glucose through the Calvin cycle, which uses the ATP and carbon dioxide to make sugar. Dark or light independent reactions occur in the stroma of the plant.
our topic right now, namely photosynthesis,is arguably one of the most important chemical reactions occurring on theplanet. Let's see why.
Photosynthesis and all associated reactions take place at the molecular level. These microscopic reactions involve several molecules aside from chlorophyll. Some of the other molecules are water (H2O), carbon dioxide (CO2), oxygen (O2), and glucose (C6H12O6). All of the components are necessary and the absence of any one of them causes the entire process to fail. For example, if there is no water available to the plant roots, they will begin to turn brown and die, effectively stopping photosynthesis. Oxygen and glucose are not used in photosynthesis, but are byproducts of the reaction. Oxygen is released into the air, and glucose is stored inside the plant cells.
The net process of photosynthesis is described by the following equation: 6CO2 + 6H2O + Light Energy = C6H12O6 + 6O2 This equation simply means that carbon dioxide from the air and water combine in the presence of sunlight to form sugars, oxygen is released as a by-product of this reaction....
While oxygen is necessary for the process of respiration, glucose plays a crucial role in the diet; and that explains why the photosynthesis is important for all the lifeforms on the planet - including humans.
The substantial international effort that has gone intounderstanding human effects on the global carbon cycle greatlycontributed to our calculations. Fossil fuel combustion iscurrently the primary cause of rising carbon dioxide levels inthe atmosphere, although the importance of land clearing andforest regrowth as a source or sink of carbon dioxide is stillbeing debated (Bolin 1977, Broecker et al. 1979, Houghton et al.1983). Efforts to resolve this issue have produced massivereviews and compilations of data on global NPP, organic matterstorage, land use, and land conversion rates (Ajtay et al. 1979,Armentano and Loucks 1984, Houghton et al. 1983, Olson et al.1983). In addition to these sources, we used the Food andAgriculture Organization's (FAO) summaries of agriculture andforestry (FAO 1982, 1983, 1984).
– Very informative computer animated videos showing the process of photosynthesis. There are two, one for land based plants and one for marine life.
There was a time a very, very long time ago when there wasn’t much oxygen around so animals and humans couldn’t exist. Well what made it all happen? The plants of course! It was only because of photosynthesis that more and more oxygen was made which meant that animals and humans could develop. Think about it this way, without photosynthesis we wouldn’t even be around.
During the process of photosynthesis, carbon dioxide plus water in the presence of sunlight, enzymes and chlorophyll produce glucose and oxygen as waste product.
While all this is going on, the process is called photosynthesis, and then oxygen is made. But the plant doesn’t need all that oxygen so off it goes into the air and lucky for us, we can then breathe properly and stay alive.
It is estimated that two-thirds of the world's forest are currently distributed among 10 countries:
Forests are hugely important for life on earth.
This paper will explain the basic components require for photosynthesis, the role of chlorophyll, how energy is transferred, and photosystems I and II and the most precious product results of photosynthesis.