Why There Would Be No People Without Plants

Symbiosis as coined by the German botanist Heinrich Anton de Bary is the relationship existing between plants and animals ever since life started on earth. What makes this bond inseparable and timeless between two different kingdoms Flora and Fauna, what is the secret to their mutualism
 
Photosynthesis according to Smith (1997) is the synthesis by organisms of organic chemical compounds, esp. carbohydrates, from carbon dioxide using energy obtained from light rather than the oxidation of chemical compounds (p. 508). Photosynthesis is what enables plants and animals to mutually depend on each other for survival as they both need something from each other. Oxygen is what people and animals breathe in and fuels the process of respiration or breathing and Carbon Dioxide that is a by-product of respiration is what plants need to produce their own energy.
 
This process takes place mainly in the plants leaves where light from the sun is being absorbed by a photoreceptor pigment called chlorophyll found in chloroplasts of green plants. Along with soil that holds that plant erect, water can be absorbed by the plant through its roots. Then molecules of light energy splits its compound, H20 (1 hydrogen, 2 oxygen), separately to hydrogen and oxygen where hydrogen is retained but oxygen is emitted unto the atmosphere. To continue the production of its energy in the form of glucose or sugar, plants need carbon dioxide to combine with hydrogen that it retained from water.
 
This is where people and animals play a vital role in the mutual relationship of plants and animals because they exhale carbon dioxide. Plants take this compound in through small holes in their leaves called stomata and combine it with hydrogen to produce its energy or fuel for its survival.
 
Given this natural process of photosynthesis, it is unimaginable for people and animals to live without plants as they would have no source of oxygen. But what if in turn, plants are placed in a circumstance without one of its necessary sources, will it live
 
If a plant is placed in an airtight container, meaning there is no atmosphere where carbon dioxide can be taken from, it will survive only a matter of time. As the plant uses what is only available, soil, water, nutrients and light it will still continue to produce the energy it needs to survive through photosynthesis. But as this process continues, the ratio of oxygen emitted by the plants empowers the carbon dioxide it needs to continue the production of glucose that is its fuel for survival. Thus photosynthesis is hindered, also hindering the plants survival. Meaning plants cant live in an airless environment without the presence of people and animals, proving that even if the unique quality of plants that enable them to produce their own energy still relies on the other specie, animals.
 
This cycle of give and take been taking place for the longest of time and is constant as time changes however many evolutions man, animal and plant has seen and would remain that way as one of earths many large and intricate ecological system.

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