Which of the following best describes the primary purpose of mitosis in multicellular organisms?

• A. To synthesize ATP for cellular energy
• B. To reduce the chromosome number by half for sexual reproduction
• C. To generate genetic diversity through crossing over
• D. To produce genetically identical daughter cells for growth and tissue repair

Answer: (D)

Verified step by step guidance

1. Understand the concept of mitosis: Mitosis is a type of cell division that results in two genetically identical daughter cells from a single parent cell. It is essential for growth, development, and tissue repair in multicellular organisms.
2. Eliminate incorrect options: Review each option and determine whether it aligns with the purpose of mitosis. For example, synthesizing ATP is related to cellular respiration, not mitosis. Reducing chromosome number by half is a feature of meiosis, not mitosis. Generating genetic diversity through crossing over also occurs during meiosis, not mitosis.
3. Focus on the correct option: The correct purpose of mitosis is to produce genetically identical daughter cells. This ensures that new cells have the same genetic material as the parent cell, which is crucial for maintaining tissue function and organismal growth.
4. Relate mitosis to its biological significance: Explain that mitosis allows organisms to grow by increasing the number of cells and helps repair damaged tissues by replacing old or injured cells with new ones that are genetically identical.
5. Summarize the key takeaway: Mitosis is a fundamental process in multicellular organisms for growth and tissue repair, ensuring genetic consistency across cells.