The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.
Answer:
A desirable intake of dietary fiber is 20-35 grams daily, according to the American Dietetic Association.
Explanation:
Dietary fiber has always been a part of a healthy, balanced eating lifestyle. Fiber has 2 types, soluble and insoluble. Soluble fiber is a <u>gelatin-like</u> substance when combined with water and when ingested, <u>can help slow the travel of food in the gut, making you feel</u> <em>"full."</em> Insoluble fiber or roughage is the <u>bulk-forming type</u>. It <u>holds water</u> in its structure, helping <u>regulate the bowel movements.</u>
Fiber, being a <u>complex carbohydrate</u>, can help <u>lessen the risk of an increase of bad cholesterol and blood sugar</u>. Examples of fiber-rich foods are whole grain products, barley, oats, grapes, etc.
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