Name: malcolm . Chapters 1 & 2 Review BIOLOGY: UNIT 1 Directions: Answer the following questions using your lecture notes and textbook for Chapters 1 and 2 by typing your answers into the yellow highlighted boxes. 1. What is the smallest unit of matter? atom . 2. What characteristics do all living things share? . 3. What is homeostasis? . 4. What are the advantages of using computer models in biological research? . 5. What is a hypothesis? . 6. What is a theory? . 7. What is the definition of a species? . 8. What are the four main types of carbon-based compounds found in living things? . 9. What is an ion? . 10. What unique quality does carbon possess that allows it to form large organic compounds? . 11. What are the steps in the Scientific Method? . 12. What is a controlled experiment? . 13. What aspect of a chemical reaction is affected by enzymes? . 14. What is the name given for genetic changes in living things over time? . 15. How does a catalyst speed up a chemical reaction? . 16. What is the pH of an acid, a base, and a neutral solution? . 17. During an experiment, which factors are observed and measured? . 18. What is the difference between a covalent and ionic bond? . 19. Complete the table below: Organic Compound Monomer Polymer Carbohydrate Lipid Protein Nucleic Acid 20. What is biodiversity? . 21. What is the negative feedback process? . 22. What are the three particles found in an atom, and where are they found in the atom? . 23. Identify the reactants and products in the chemical reaction below left reactant right products . 6CO2 + 6H2O → C6H12O6 + 6O2 24. What is a monosaccharide and a polysaccharide? . 25. When enough experimental data supports a hypothesis, the hypothesis becomes a(an)? .