KSU BIOL 198 Exam 1 Test Questions with Answers

SpectrophotometerInstrument that measures the concentration of solutions by shining a beam of light at it. AbsorbanceMeasures the amount of light absorbed by the dissolved or suspended material. Therefore absorbance is directly proportional to the amount of dissolved or suspended material in a solution. Two kinds of microscopesCompound & dissecting Relevant parts of compound microscopeEyepiece, mechanical stage (where specimen is placed), objectives with different magnifications, condenser that focuses the light from underneath specimen How do you adjust magnifications on the microscope?Place specimen and adjust condenser and center the slide. Then go from lowest to highest, using only the fine focus knob. BiologyThe study of life ScienceUsed to prove things true or untrue, via observation or experiment. Evidence based. Provisional. Produces theories and hypotheses. TheoryGeneral set of principles supported by evidence that explains some aspect of nature. HypothesisAn educated guess, testable, answers a particular question The scientific method1. Observation 2. Question 3. Hypothesis 4. Test/experiment 5. Conclusion Levels of organization (living things)1. Biosphere 2. Ecosystem 3. Community 4. Population 5. Organism 6. Organ system 7. Organ 8. Tissue 9. Cell 10. Molecule