WO OF more substances c. Substance, because heating the sample produced two different substances D. Element, because the original sample can be further divided into simpler substance 8. Suppose you put a teaspoon of sugar in a glass of water. You stir it and it dissolves. You continue to add sugar until it no longer dissolves regardless how much you stir it. What type of solution have you formed? A. diluted solution B. saturated solution C. unsaturated solution D. supersaturated solution 9. How can one turn a saturated solution to an unsaturated one? A. by adding more solute B. by boiling the solution C. by adding more solvent D. by cooling the solution 10. A solution is prepared by dissolving i20 mL of agua oxinada in water to make 4,250 ml of solution. What is the % by volume of the agua oxinada solution? A. 2.0% B. 2. 5% C. 2.75% D. 2.82% 11. Which part of the microscope regulates the light directed at the subject? A. Course adjustment knob B. Diaphragm c. Objective D. Ocular 12. Which part of the microscope holds and turns the objectives into position? A. Base B. Stage C. Eyepiece D. Nosepiece 13. Can a compound microscope be used to view a SARS-CoV-2 sample? Why/Why not? A. No, since the virus cannot be seen by any known optical instrument to date. B. Yes, because when in large amounts, the virus clump together and become larger. C. No, since the virus has exceeded the limit of resolution of the compound microscope. D. Yes, since the virus has not yet exceeded the limit of resolution of the compound microscope. 14. Interaction between different populations inhabiting/living in a given area. A. Biosphere B. Community C. Ecosystem D. Organ System 15. Individual living things composed of several organ systems that function altogether. A. Cell B. Community D. Organism c. Organ 16. Which of the following statements about cells are TRUE? I. Cell is the most basic unit of life. II. All cells come from preexisting cells. III. All living things are composed of one or more cells. IV. Plants and Animals have the same cell parts with the same functions. A. I, II, III B. I, III, IV C. II, III, and IV D. 1,11,111,1V 1​