Photosynthesis Why There Would Be No People Essay

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Photosynthesis Why There Would Be No People Without Plants.

Plants play a crucial part in the life circle of animals and human beings and their importance in life cannot be undermined, they contribute to the global food chain as the primary source of food and are the reason that life exists. The lives of all the living organisms and human beings are dependent on plants, hence an explanation as to why plants are placed at the bottom of the food chain. Apart from the plants, no living creature can derive or make its own food, it is only the plants which are self sufficient and can manufacture their own food for survival (Anne, 2007).

Plants through the process called photosynthesis take in water, carbon dioxide and light to produce sugar which is in form of glucose and release a lot of oxygen into the air. Photosynthesis takes place in the chloroplasts using the green pigment called the chlorophyll found in the mesophyll cells of the leaves. The upper and the lower epidermis parts of the leaf provide protection while gaseous exchange takes place through the microscopic holes found...

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When human beings and other living creatures respire, they breathe out carbon dioxide into the air and take in oxygen, the released carbon dioxide by the living organisms form part of the carbon dioxide available in the atmosphere for plants intake which aid in photosynthesis (Global change, 2012).
Plants do take in carbon dioxide for photosynthesis to take place and release oxygen primarily by the leaves but there are other parts of the plant that require the intake of oxygen which are not involved in the photosynthetic process, these are majorly found in the root cells. The root cells are responsible for the growth of root hairs which aid the plants in their food uptake and other nutrients from the soil. These cells are categorized as living…

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References

Anne StClair, 2007. Helium. The importance of plant life in the global food chain. Retrieved April 19, 2012 from http://www.helium.com/items/255011-the-importance-of-plant-life-in-the-global-food-chain

Ecochem, 1998. Phosynthesis, Respiration and transpiration. Retrieved April 19, 2012 from http://www.ecochem.com/resource_transpiration.html

Global change, 2012. A Premier on Photosynthesis and the Functioning of cells. Retrieved April

9, 2012 from http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/energyflow/psn_primer.html


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