Biology - Microscopy Practical

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Fråga		Svar
Why is iodine solution added to onion cells? börja lära sig		To stain the cells so they are easier to see.
Why is coverslip lowered at an angle? börja lära sig		To prevent air bubbles from forming.
Which objective lens should you start with? börja lära sig		The lowest power objective (usually 4x)
Which focusing knob should be used first? börja lära sig		The coarse adjustment knob.
Which focusing knob is used for clear focus? börja lära sig		The fine adjustment knob.
What should you do after finding cells under low power? börja lära sig		Switch to a higher power lens and refocus using the fine adjustment knob.
How is total magnification calculated? börja lära sig		Total magnification=eyepiece lens x objective lens
What should the biological drawings include? börja lära sig		Labels and magnification.
What is the formula for calculating actual size? börja lära sig		Actual size=image size/magnification
How many micrometres are in 1mm? börja lära sig		1000 micrometres
Put the osmosis practical steps in order: Record final mass, Place in solutions, Cut potato cylinders, Blot dry, Record initial mass börja lära sig		1. Cut potato cylinders 2. Record initial mass 3. Place in solutions 4. Blot dry 5. Record final mass
Put these microscope steps in order: Use fine focus, Place slide on stage, Choose low power lens, Use coarse focus, Switch to higher power börja lära sig		1. Place slide on stage 2. Choose low power lens 3. Use coarse focus 4. Use fine focus 5. Switch to higher power

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