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Adaptations, interdependence and competition GapFill

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All living organisms belong to a particular . This can be small, such as a mouldy apple, with organisms including bacteria and fungi, or as large as a rainforest, with an incredible variety of species. Every organism is dependent on another for survival, and in some cases the survival of one species can be directly affected by the presence of another. This is called , and includes certain species of plant relying directly upon certain insects to their flowers.

All factors that can affect life in these systems can be divided into two groups: biotic and . The biotic factors can include how much there is for organisms, the presence of predators or that can cause disease, and competition which can limit breeding and survival of organisms. The non-living factors which can affect organism survival are much more vast. For example, light intensity can affect many organisms, but most directly plants which are performing . This process can also be affected by availability and carbon dioxide levels. Temperature and the pH of soil or water can also have a direct effect on species.

In many instances, the amount of each of these factors will be at the ideal amount for all organisms, and in these cases, the system is described as a . Generally this occurs because organisms are well to live in their environment through the process of natural selection. There are even some organisms that can survive in extreme environments which would be inhospitable to many other species, and these are called .

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