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BIO 001





biological methods

&

application





by







Dr
...

3

Materials


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HB pencil (lead pencil)
A good sharpener/ blade
A good eraser
Plain sheets (unlined)/Lab manual
A ruler
A pen

4

Rules for Biological Drawings
• If you see something, DRAW something
...

• Neat and labelled DRAWINGS on unlined
(blank) paper

5

Rules for Biological Drawings
• Large DRAWINGS to show all parts without
crowding
...

• DRAWINGS must be about half a page in size
...

• Label on the right-hand side of the page

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Rules for Biological Drawings
• Lines to the labelled par ts should be
drawn with a ruler parallel to each other
...

• Use a ruler for label lines
...

 All DRAWINGS are titled above
 The Magnification of the object drawn
follows the title and is in parentheses
...


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Rules for Biological Drawings
• Name and date are written in the top right
hand corner
...

• Don’ts crossover lines


11

Magnification Calculation
 Under the Microscope

 Total magnif ic ation = eyepiece lens x
objective lens

 So, if we use a 16x eyepiece lens and a
10x objective lens the total
magnification is:

 16 x 10 = 160x magnification
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Magnification Calculation
Biological drawings: measure it with a ruler (in
mm)
•  the size of the drawing
• the actual size of the object
• the magnification of your drawing
• magnification = size of drawing (mm)/size of
the real thing (mm)
The size of the real thing is usually given to you

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