1. What is the biochemical evidence that supports evolution? 2. What is a double-blind clinical trial? Why are such trial important in medical research? 3. Why do antibiotics, which kill bacteria, gradually lose their effectiveness? 4. What is natural selection? Give 2 examples of natural selection at work. 5. Fossils are normally found in sedimentary rock. Why aren’t they likely to be found in igneous rocks?
Answer all questions with 4 paragraphs in length for each