Essay about Laboratory Assignment: Virtual Microscopy

1615 Words Oct 19th, 2014 7 Pages
BIOL 1020
Lab Assignment: Virtual Microscopy
Start by re-saving this file as follows: lab_surname_virtualmicroscopy.rtf, substituting your own surname.
Type your responses to the questions below where indicated. Remember to save your work frequently.
Viewing Magnification, Field of View, and Specimen Size
1. On the UD Virtual Compound Microscope, examine the onion root tip slide at 400X viewing magnification. Ensure that the image is centred.
What is the approximate size of an onion root tip cell? Show your work and specify which dimension of the cell (length or width) you are using. (2 marks) RESPONSE: The dimension of the cell I am using is length. The number of specimen is 11.
The Field of view would be 0.35 mm because we
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Are any of these organisms a potential prey item for any of the others? If so, which one(s)? Support your answer with calculations; be sure to include the correct units. (2.5 marks)
RESPONSE: Organism A: Has an objective magnification of 4X making the field of view for this organism 3.5 mm.
The number of specimen that fit in the FOV is 7 and the dimension I’m using is width. Actual size= FOV diameter/ #of specimen that can fit in FOV
Actual size= 3.5mm/7= 0.5 mm
The approximate size of Organism A is 0.5.mm
Organism B: Has and objective magnification of 100X making the field of view for this organism 0.14mm.
The number of specimen that fit in the FOV is 1 and the dimension I am using is length. Actual size= 0.14mm/1=0.14mm
The approximate size of Organism B is 0.14mm.
Organism C: Has an objective magnification of 10X making the field of view
1.38mm.
The number of specimen that can fit in the FOV is 2 and I’m using the dimension width. Actual size=1.38mm/2= 0.69mm
The approximate size of Organism C is 0.69mm.
Organism C and Organism B could prey on organism A but Organism C could not prey on organism B.

PLEASE LEAVE THE SPACE BELOW EMPTY FOR TA COMMENTS

7. Image D represents a sketch of Organism C from the pond water sample.
The box around it represents a piece of 8.5 in x 11in (21.6 cm x 27.9 cm) paper. Calculate a distance to be represented by the scale bar; show all of your work, including the correct units. (3 marks)
RESPONSE:

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