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Biosphere is defined as that part of the earth and atmosphere in which many smaller ecosystems exist and operate. Three main subdivisions of the biosphere are lithosphere solid matter ; hydrosphere liquid matterand atmosphere or the gaseous envelope of the earth which extends up to a height of The area of contact and interaction between these components is really important for life, for it is here that the entire life is confined and the basic processes of life like photosynthesis and respiration occur.
Living organisms are, mostly, confined to the parts of biosphere that receive solar radiation during the day. As stated above this includes atmosphere, the surface of land, the few meters of soil and the upper layers of water of oceans, lakes and rivers.
The illuminated zone may be a few centimeters in turbid water of a river, and up to about meters in clearest part of an ocean. In the ocean, the biosphere does not end where light ceases as gravity enables the energy flow to continue downward, since fecal pellets, cast skins and organisms dead and alive are always falling from the illuminated regions into the depths.
In addition to the extension of the biosphere downwards, there is a limited extension upwards also. On very high mountains, like Himalayas, the limit above which chlorophyll-bearing plants cannot live appears to be about 6, meters.
In simple words, biosphere can be viewed as the part of the earth consisting of oceans and the surface of the continents, together with the adjacent atmosphere i. However, polar ice caps and the higher mountains slopes above the snow line are known as parabiosphere. Since living organisms require inorganic metabolites from each of the subdivision of the biosphere, water from the hydrosphere, mineral from lithosphere and chemical elements from atmosphere, a brief discussion on the nature and working of each subdivision will help us to know the mechanism which influences metabolic activities of living organisms.
Atmosphere Atmosphere is of much significance to life as all the components of air except inert ones serve as metabolites, and each chemical element circulates through a cycle maintaining a perpetual supply of metabolites. It is at this stage that the role of organisms and significance of atmosphere to life emerge on the interface of the biospheric subdivisions.
The metabolic role of a few important gases in the following pages will highlight the importance of atmosphere. The green plants incorporate a variety of inorganic elements and compounds.
For example, during the process of converting solar energy into chemical energy, atmospheric carbon dioxide enters the living world as the basic constituent of all organic compounds. Carbon dioxide along with water is used by all plants in their photosynthetic process to produce organic substances such as, glucose a vital molecule in living things, and oxygen.
The chemical reaction involved in the process is as follows: Photosynthesis thus provides food for us to eat and oxygen for us to breath.
Here, the carbon and oxygen supplied by carbon dioxide remain in living matter until death.
How many pages is a word essay, - I need to buy a research paper. Whenever you feel that your essay misses something, you can send us a free revision request, and your writer will provide all the corrections. Better Essays words | ( pages) | Preview Edgar Allan Poe's Use of Descriptive Language in The Pit and the Pendulum - Edgar Allan Poe's Use of Descriptive Language in The Pit and the Pendulum Edgar Allan Poe has been known for writing stories of mystery and horror. Descriptive Essay Samples One of the most popular forms of essays, it is important to grasp how to write one. Look at our samples of descriptive essays to understand how to write them on your own.
Only after decomposition of the living matter, the CO2 returns to the atmosphere to complete the cycle. At this point we should remember that photosynthesis occurs only in chlorophyll bearing organisms, namely, green and purple bacteria, blue green algae and the vast population of higher plants.
Oxygen, an important constituent of the atmosphere, enters the living world through respiration, which is a familiar process in both plants and animals including man.word essay on the importance of accountability in the army Free Essays on Word Essay On Accountability Responsibility for students.
Accountability in the army is important because soldiers as well as equipment, ammunition, food, water and other various Words on Accountability. Descriptive Essay - The Pier - Naples, not the most exciting place on the planet. No, people have seemed to conclude that Naples, FL is the place to go for a .
A standard word essay example is an essay on the given topic or a topic of your own choice (in case your professor or tutor did not give you any).
The number of word essay pages should be one or two A4 sheets, not more, so maybe it is not as much as you think. Biosphere is defined as that part of the earth and atmosphere in which many smaller ecosystems exist and operate.
Three main subdivisions of the biosphere are lithosphere (solid matter); hydrosphere (liquid matter), and atmosphere or the gaseous envelope of the earth which extends up to a height of km. The word count is also important to keep in mind: for example, you can cover a more complex and serious topic in a word essay than in a word essay.
If a topic is not specified, there is a great variety of things to write about. 4 Pages ( words) Essay GCSE English descriptive writing:Chinese Spring Festival Market (in Beijing, Shanghai, Nanjing or other city) The breeze skimming the cold waters of the Huangpo River sent shivers down my spine.