Fiber is a polysaccharide that gives plants their structure, and the bonds that hold the fiber molecules together are unable to be digested by human digestive enzymes. Fiber plays an important role in a healthy diet by promoting healthy passage of stool and by helping to prevent many digestive and chronic diseases.

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human impact on the environment can be seen in the deterioration of the !

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no i don't feel that humans have oversubscribed some medications

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

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it marks things for degradation via the proteasome. it alters there celluar location.