Ans. Abnormal cell division can lead to various consequences, including the formation of tumors and the development of cancer. When the cell cycle is not properly regulated, cells can divide uncontrollably, leading to the formation of masses of cells known as tumors. These tumors can be benign (non-cancerous) or malignant (cancerous) and can interfere with normal tissue function. Therefore, understanding and studying cell cycle regulation is crucial in the field of cancer research.