we know that environment is the source of materials for all living organisms environment provides bio elements which are used by organisms for their bodies and metabolism the organisms and environment biochemical cycles are the cyclic pathway through which materials move from environment to organisms and back to environment                             



                                                                                      1.Carbon cycle                                                                                                                                                carbon atom is the principal building block of many kinds of bio molecules .carbon is found as graphite and diamond in nature .it also occurs as carbon dioxide in atmosphere.  Major source of carbon from the living world is carbon present in atmosphere and water .fossil fuels like peat,coal, nature gas and petroleum gas and petrol also contain carbon. carbonates of Earth's crust also give rise to carbon dioxide                                                                                                                                                                       


                                                     .the major process that brights carbon from atmosphere or water into living world is photosynthesis. produced take in carbon dioxide from atmosphere and convert it into organic compounds. in this way, carbon  becomes a parts of the body of producers. this carbon enters food change and is passed to herbivores and decomposes. Carbon dioxide is released back to environment by respiration of producers and consumers.it is also released by the decomposition of organic wastes and dead bodies by decomposes. Burning of wood and fossil fuels also adds large amount of carbon dioxide into atmosphere                                                                                                          2.Nitrogen cycle nitrogen is an important compound of many molecule like protein and nucleic acid(DNA and RNA) atmosphere is the resolver of free gases nitrogen living organisms cannot pick up this gases nitrogen directly from atmosphere (except for nitrogen fixing bacteria)it has to be converted into nitrates to be utilized by plant nitrogen cycle involves several stages                                                                                                                                                                                                                                                                         a_Formation of nitrates.it is done by following waves                                                                                                                                                                          1.Nitrogen fixation. The conversion of nitrogen gas into nitrate is called nitrogen fixation. are and as a result combine with other salts to form acids. Nitrate is known as atmospheric nitrogen fixation.                                                                                Additionally, some bacteria have the capacity to convert atmospheric nitrogen into nitrates, a process known as biological nitrogen fixation. Many of these nitrogen-fixing bacteria are free-living, whereas others exist as symbiotic                                                                            *In productive, nitrogen fixation is also carried out.Hydrogen is combined with ambient nitrogen in the process of "industrious nitrogen fixation" at high pressures and temperatures to create amino, which is then transformed into ammonium nitrate.                                           2. Ammonification and nitrification.Ammonia is produced when nitrogenous wastes and the end of dead organisms are broken down in ammunition. The process of turning ammonia into nitrites and nitrates once it has formed is known as nitrification, and it is carried out by e b bacteria. Ammonia from bacteria is initially transformed into nitrates by atria (consumers).Other bacteria, such as those that produce nitroglycerin, subsequently transform the nitrites into nitrates.                                                                                              B. Assimilition                                                                                                                          The plant absorbs the nitrate created by the aforementioned processes and uses it to make protein and other things. Animals obtain nitrogen compounds from plants; assimilation is the term for how organisms use nitrates.                                                                                    C.Denitrification                                                                                                                        It is a biological process in which bacteria are used to convert nitrates and nitrates into nitrogen gas, which is then released back into the atmosphere.       

                                                                                                                                                                                                                                                                                                           thanks for visiting our site