3. On Mercury: You Would Be Insulated and Radiation Resistant
Mercury experiences extreme heat during the day and freezing cold at night. Your body would need an inner layer of insulation beneath your skin to survive. A layer of fat would help retain warmth, while longer limbs would assist with movement.
Your cells would be highly resistant to solar radiation. To breathe, you might develop a new organ that could extract oxygen from minerals you consume, similar to how plants perform photosynthesis.
