Exercise 1.7 - Measurement of Cell Organelles

LEVEL I

Figure 1.9 Photo of various cells showing organelles

Materials

• Prepared Slides of the following:
  • Paramecium
  • Euglena
  • Spirogyra
  • Onion Root Tip
  • Trachea
  • Mitochondria
  • Dicot Leaf x.s.
• Microscope

Procedure

1. Each of the slides presents a representative cell, with various organelles of particular interest. Figure 1.9 gives a sample of some of these cell types. Observe each slide, and make a drawing of each cell and its representative organelle(s). Each drawing should meet the following guidelines:
   • All drawings must be completed in pencil. A #3 pencil is preferred since it will not smudge as readily as the standard #2. Colored pencils are optional. Ink is unacceptable.
   • Each drawing must be a minimum of 4" x 5" in size. Smaller drawings will not demonstrate sufficient detail, while much larger drawings require excessive time to fill in detail.
   • Drawings should be completed during the lab period and where applicable, on any forms provided.
   • All labels should be added and appropriate indications of size should be made. Size is best indicated by including a ruler bar at the bottom of the drawing, drawn to scale and with the dimensions added.

2. Measure the appropriate dimensions of all structures. Label the drawings, and indicate the magnification used to view each.

3. On each drawing, place a line (bar) to indicate a length of 10 microns.

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