In the biological environment, there are many factors that have impacts on the structure of living organisms.
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In the biological environment, there are many factors that have impacts on the structure of living organisms. They have to adjust to themselves in the surrounding factors for their survival. Bony fishes and koalas, have a huge difference, they both live in different habitats and different eating patterns, so they would have different internal and external structures which allow, assist and is suitable for their existences and survival, such as the digestive system, the respiratory system, the excretory system and the circulatory system. Koalas and Bony fishes feed differently, while the koala is an herbivore, bony fishes can be either herbivores or carnivores or detritivores. Like all organisms, koalas and bony fishes have a digestive system too. But they are both different in shape and size. Koalas own a caecum (2.5 m long), necessary for the digestion of eucalypt leaves that are high in fibre but very low in protein content....

