D. all of the above 23. Your neighbor looked like the picture of health. He ate right, exercised regularly and didn't smoke or drink. You find out that he has lung cancer. It turns out that his job for many years was to clear asbestos out of old buildings.
Asbestos is a potent carcinogen.
For your neighbor, asbestos was a A. disease B. mutation C. risk factor D. all of the above 24. This would make the solution A. acidic B. basic C. buffered D. have a high pH 25. Cristae are components of A. mitochondria B. nuclei C. nucleoli D. rough endoplasmic reticula 26. You go outside on a warm summer day and feel the warmth on your face. This is an example of A. homeostasis B. irritability C. metabolism D. natural selection 28.