The cell cycle begins before mitosis
The cell cycle begins before mitosis
All cells arise from pre-existing cells. In multicellular organisms, only some cells still divide, but those dividing cells are essential for growth, tissue repair, and asexual reproduction.
Step-by-step lessons on AQA A Level Biology All cells arise from other cells, covering All cells arise from other cells. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.