Mitosis Roles in Growth and Repair

Steps:

• Define mitosis as the process of somatic cell division producing two identical daughter cells for multicellular organisms.
• Identify stem cell growth: mitosis allows stem cells to proliferate, increasing cell numbers for tissue development.
• Identify replacing lost skin cells: mitosis in epithelial tissues regenerates cells to maintain skin integrity after loss or damage.
• Match to options: only B correctly identifies both as valid roles with ✓ marks.

Why B is correct:

• Mitosis supports asexual cell division for growth (stem cell proliferation) and repair (skin cell replacement), per the cell cycle's somatic division phase.

Why the others are wrong:

• A: Wrongly marks skin cell replacement as x; mitosis directly enables this tissue maintenance.
• C: Wrongly marks stem cell growth as x and mislabels overall as not correct; both roles apply.
• D: Incorrectly marks both as x; mitosis performs both functions in eukaryotic cells.

Final answer: B