Q1. A 55-year-old male was admitted to the hospital with heart failure. He complains of increasing shortness of breath on exertion and needing to sleep on three pillows at night. On physical assessment, nurse determines that his ankles and feet are very swollen. What is left-sided and right-sided heart failure? Which of these symptoms reflect left-sided heart failure and which reflect right-sided heart failure? Why with reasons?

Q2. The living world is affected by a variety of physical forces that operate the earth. One such force is climate change. Give details how climate change can be linked to the theory of evolution. How does climate change effect natural selection?