Bio 107 Final Lab Exam PRACTICE QUESTIONS ANSWERS

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Department
Biology (Biological Sciences)
Course Code
BIOL107
Professor
Christopher Cairo

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Lab 1Microscopy and Environmental SurveyPossible Exam Questions1 Increasing the resolution of a microscope can be accomplished by a Increasing the magnification of the ocular lens b Increasing the numerical aperture of the objective lens c Adjusting the condenser d Increasing the wavelength of light2 Increasing the resolution value of a microscope can be accomplished by a Increasing the magnification of the ocular lens b Increasing the numerical aperture of the objective lens c Adjusting the condenser d Increasing the wavelength of light3 Parfocal is a The distance between the ocular lens b The distance between the lens and the specimen c The ability to stay in focus between objective lenses d Using the same numerical aperture for each objective lens4 An organism that is normally fresh water would shrink in salt water because salt water isa Hypotonic b Hypertonic c Isotonic d Salty5 In hypotonic solutions plant cells becomewhile animal cellsa Turgid flaccid b Turgid swell c Flaccid shrink d Shrink burst 6 TFThe formula for calculating the magnification of a drawing is useful fordetermining the size of the specimen AnswerFalseTo read true change formula for calculatingdrawing to proportion of field of view or ocular micrometer7 T FThe specimen must be in focus prior to focusing the condenserAnswerTrue 8 T FInterpupillary distance needs to be calculated for each objective lens AnswerFalseTo read true change interpupillary distance to resolution 9 T F The independent variable tests the effect of the surrounding media in the algae experiment AnswerFalse To read true change tests the effect of to is The independent variable is the variable that is manipulated by the experimenter 10 T F In the algae experiment the osmotic potential of a solution was kept constant Answer False The osmotic potential was the independent variable 11 TF Distilled water is hypotonic to MesotaeniumAnswer TrueDistilled water is hypotonic for everything12 T FThe three lenses of the microscope are objective ocular diaphragm AnswerFalseTo read true change diaphragm to condenser13 Your supervisor has informed you of her hypothesis that undergraduate students that drink caffeinated Cocacola prior to an exam are less successful than those that do notYou devise the following experiment10 Biology 107 students are split into two halves one half drink Cocacola prior to the midterm the other half do notIs this a sound experimental designWhy or why notAnswerNoBecause you have not eliminated the main variable of interestcaffeineIt could be the sugar in the CocaCola or the salt that makes students do worseThe best experiment is always to remove only one variablein this casecaffeineTherefore it would be better to test caffeinated vs decaf Coke vs waterIn other words you need a solvent control group 14 In the above experiment the independent variable is a Cocacola b The group that does not drink Cocacola c The midterm exam d The group that drinks Cocacola
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