The Importance Of Photosynthesis

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PHOTOSYNTHESIS, FOOD WEBS AND FOOD CHAINS PHOTOSYNTHESIS PHOTOSYNTHESIS is a process in which plants convert light energy directly into chemical energy in presence of sunlight.This chemical energy produced is stored in plants in the form of sugars and is used whenever required. The name photosynthesis is derived from the Greek φῶς, phōs, "light", and σύνθεσις, synthesis, "putting together”. In most cases, oxygen is also released as a waste product. Most plants, most algae, and cyanobacteria perform photosynthesis. Photosynthesis maintains atmospheric oxygen levels and supplies all of the organic compounds and most of the energy necessary for life on Earth.Photosynthesis plays a much vital role in obtaining our food.Our food is mainly the product…show more content…
However, not all organisms that use light as a source of energy carry out photosynthesis, since photoheterotrophs use organic compounds, rather than carbon dioxide, as a source of carbon. In plants, algae and cyanobacteria, photosynthesis releases oxygen. This is called oxygenic photosynthesis. Although there are some differences between oxygenic photosynthesis in plants, algae, and cyanobacteria, the overall process is quite similar in these organisms. However, there are some types of bacteria that carry out anoxygenic photosynthesis. These consume carbon dioxide but do not release oxygen. Carbon dioxide is converted into sugars in a process called carbon fixation. Carbon fixation is an endothermic redox reaction, so photosynthesis needs to supply both a source of energy to drive this process, and the electrons needed to convert carbon dioxide into a carbohydrate. This addition of the electrons is a reduction reaction. In general outline and in effect, photosynthesis is the opposite of cellular respiration, in which glucose and other compounds are oxidized to produce carbon dioxide and water, and to release exothermic chemical energy to drive the organism's metabolism. However, the two processes take place through a different sequence of chemical reactions and in different cellular…show more content…
The lowest trophic level, Level 1, is that set of organisms that can manufacture their energy and biomass using only sunlight, drawing inorganic nutrients from the soil or water. Feeding upon this lowest tier of organisms are Level 2 organisms in the food chain, often classified as herbivores.To allow for the fact that most higher level taxa consume more than one species of prey, the concept of trophic levels other than whole numbers is allowed. The trophic level theory is an elegant formalism that assists in explaining many ecological relationships.Let us begin the details of trophic level from level 1. Primary producers: The lowest trophic level is typically populated by primary producers, those organisms who can synthesize the entirety of their biomass solely from primary energy (such as sunlight) and primary nutrients extracted from the environment (e.g. nitrate, phosphate). These Level 1 organisms are typically plants and algae.Primary producers may be either terrestrial or aquatic. Common aquatic species include phytoplankton, diatoms and much larger species such as kelp. Terrestrial species include the whole gamut of angiosperms and gymnosperms, ferns, mosses0, lichens and other non-vascular

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