Answer:
a is the answer the the following question
The answer is cancer.
Cancer is an uncontrolled division of cells. The regulation of cell cycle is necessary for normal cell division. The first phase of the cell cycle is the G1 phase. If the G1 phase is affected, mistakes in this process lead to the uncontrolled division of cells called cancer.
by the law of natural selection, daddy charles darwin stated that overpopulation could result in famine and wars, and death would accelerates across nations, so overpopulation is a cause for this because of too many organisms but not enough food, which declined growth rate.
The nervous system is divided into several parts, and in this case, the answer is Sympathetic Nervous System.
SNS is responsible of the regulation of homeostatic organic mechanisms; such as fighting and running behaviors, heart rate, dilation of bronchi and pupils, and adrenal glands stimulation.
