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Are all toxic materials subject to biological magnification? What are the requirements for magnification to occur?
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- If we wanted to know how “red” a red liquid solution is, we would use a light transmittance measurement. Based on the lab, what device would be used? a) manometer b) chromatogram c) spectrophotometer d) manometer and spectrophotometerIt is desirable that the microscope objectives be parfocal because the specimen will be .................. a)blurry due to the changes in the refractive index of the medium b)stay in focus when the light is turned off c)have more contrast and enhanced details d)remain in focus if the magnification is changed e)none of the answer choicesWhat is the differences between ocular magnification and objective magnification? What are the best usage for each magnification and how it is being prepared?
- Why is it necessary to know the accurate proportion in mixing bleach and water in cleaning and disinfecting high-touch surfaces daily in household common areas like tables, hard-backed chairs, doorknobs, light switches, or phones?What are some ill effects of improper use of bleach in households cleaning?what is the purpose of using oil immersion with the 100x objective lens? a)To prevent refraction of light b)To prevent scratching the slide c)To allow microbes to resuspend in the fluid d)Oil is not used with the 100x, but rather 40x e)To prevent microbes from dryingDefine each of the following terms: A) What is resolution and how is resolution related to the wavelength of light used to illuminate the sample? B) What is the magnification of the specimen if you are using a 40x objective and a 10x eyepiece? C) How is the numerical aperture (NA) of a lens related to its ability to gather light from a specimen?
- Is biological magnification still a problem?Given the following common laboratory materials, which of the three methods of heat sterilization do you think is the most appropriate and practical to use in sterilizing them ? Why do you think so ? a) empty flask b)L-rod (glass rod c)10 ml glass pipet d) wire needles e)antibiotic solutionThe benefits of properly using radioactivity include al Treating cancer in human beings. Ob) Irradiating food to kill harmful bacteria. c) All of these Od) Measuring the proper amounts of fertilizer on farms.