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20.09.2020 •
Biology
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)? .
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Ответ:
In H2O, there are two lone pairs and two bond pairs. ... This repulsion is stronger than the repulsion between the lone pair and the three bond pairs on the nitrogen atom. Since the repulsions on the bond pairs in H2O molecule are greater than that in NH3, the bond angle in water is less than that of ammonia.