The correct answer is "fiber".
Fiber is actually indigestible food products such as cellulose that aids in the digestion and bowel function. Fiber, first of all, limits the absorption of extra fats therefore preventing hypertriglyceridemia and eventually cerebrovascular and cardiovascular consequences. Fiber also limits glucose absorption controlling type II diabetes. Lastly, fiber also acts as protection in the colon by increasing the transit times of potentially carcinogenic substances found in food, therefore preventing colon cancer.
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(4) organisms in a changing environment must adapt to acquire necessary traits and survive
In metaphase I of meiosis I, the pairs of homologous chromosomes, also known as bivalents or tetrads, line up in a random order along the metaphase plate. The random orientation is another way for cells to introduce genetic variation.
Primary succession would most likely occur after a lava flow.