Required Practicals Flashcards
PAG 01: What is the function of the stage micrometer?
Calibrate the eyepiece graticule so that it can be used to make measurements
PAG 01: How is an eyepiece graticule calibrated?
- Select the desired magnification and objective
- Place the stage micrometer on the stage
- Line up the scales of the micrometer and the eyepiece graticule
- Count the number of divisions on the eyepiece graticule equivalent to each division on the stage micrometer
- Calculate the length of one division of the eyepiece graticule
PAG 01: Outline the procedure to preparing a slide
- Stain the sample with an appropriate dye
- Mount the sample on the slide
- Place a cover slip carefully on the slide, avoiding air bubbles
How is magnification calculated?
Magnification =
size of image / size of object
PAG 02: What can be observed when feeling the walls of the four heart chambers?
- Walls of the atria are thinner than ventricles
- Wall of left ventricle is thicker than the right ventricle
PAG 02: State an observable difference between veins and arteries
- Walls of arteries are thicker
- Veins have valves and a larger lumen
PAG 02: Why are plant tissues stained before they are observed?
So that different tissues and organelles appear as different colours to be more easily identified
PAG 03: list some abiotic factors
- light intensity
- temperature
- water supply
- nutrient supply
- humidity
- wind speed
- day length
- rainfall
PAG 03: list some biotic factors
- Competition for resources
- Predation
- Disease
PAG 03: How is percentage cover calculated?
Need to complete this… look on PMT Flashcards for PAG 03
