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Why is photosynthesis important to the survival of all organisms in an...

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simonehenry | Student, Grade 10 | eNotes Newbie

Posted April 20, 2010 at 5:11 AM via web

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Why is photosynthesis important to the survival of all organisms in an ecosystem?

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besure77 | Middle School Teacher | (Level 1) Senior Educator

Posted April 20, 2010 at 7:42 AM (Answer #1)

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Photosynthesis is incredibly important in numerous ways. Everything in an ecosystem is a part of a food web. Trees, plants, flowers, shrubs, algae, etc. all need the sun in order to convert the suns light into energy. Here is an example that will make it easy to understand. All of the things I listed above cannot survive without using photosynthesis. So for example, there would be no trees. Without trees there would not be hiding places for a number of different animals. Since these animals did not have adequate hiding areas, they would be eaten very easily by predators. Since the predators are eating all of these animals, there would be a shortage of food for them and they may not survive. Every living thing is dependent upon another for survival in some way.

In addition, without the sun providing energy for all the "green" things on this planet, we would not have the oxygen that we need to survive. Without the sun, there would not be any ecosystems.

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krishna-agrawala | College Teacher | Valedictorian

Posted April 20, 2010 at 11:06 AM (Answer #2)

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Photosynthesis is the process by which plants make their food using sunlight and the carbon-dioxide in the atmosphere. Without photosynthesis, there will be no plants in the ecosystem. Also there will be no way to convert the carbon-dioxide generated by animals to be converted back in oxygen and carbon.

The absence of plants, resulting from non-existence of the process of photosynthesis, will stat a chain of reactions that will end all animal life in the ecosystem. Animals are not able to produce the food they need for sustaining life. Animals cannot produce from simple chemicals, complex compounds required by them to create and sustain their life. They can only produce complex compounds required by them from other complex compounds produced by plants. In this way, animals get their food either from plants, or from the animals who live off plants. Thus without plants there will be no animals subsisting directly on food from plants. And in absence of such animals there will be no animals subsisting on food obtained from other animals. Thus without photosynthesis there will be no plant or animal life on earth.

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juliet926 | Student , Grade 10 | Salutatorian

Posted October 22, 2010 at 9:16 PM (Answer #3)

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Photosynthesis is the building up of food components from water absorbed from the soil through the roots and carbon dioxide, absorbed through the stomata from the air along with the use of sunlight to split up water molecules to form hydrogen and oxygen.

Thus, oxygen is released and carbon dioxide is absorbed. This is a vital process. And the plants are called the producers because they are the only major living things that make their own food and as we can't photosynthesize (make our own food like the plants) so we will have to depend upon them and so is the other animals!!!

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