2. After 30 minutes have passed, attach screw clamps to each spot that you marked on the tubing. While your partner holds the corks firmly in place, tighten the middle clamp first, and then tighten the outer clamps.

3. Immediately pour the contents of each section of tubing into the test tube labeled with the corresponding number.

4" ^^ CAUTION Put on safety goggles before ^^ handling methyl cellulose. If you get methyl cellulose in your eyes, immediately flush it out at the eyewash station while calling to your teacher. Stopper test tube 1, and invert it gently to distribute the shrimp. Use a pipet to draw a 1 mL sample of shrimp culture and transfer the culture to a Petri dish. Add a few drops of methyl cellulose to the Petri dish to slow down the shrimp. Count the live shrimp, and record the count in your lab report.

5" Dispose of the shrimp as your teacher directs. ^^ Repeat step 4 four more times for a total of five counts from test tube 1.

6. Calculate the average number of shrimp in test tube 1, and record the result in the data table you made in your lab report.

7. Repeat steps 4-6 for the contents of each of the remaining test tubes.

8" ijjK Clean up your materials, and wash your ^r hands before leaving the lab.

9. In your lab report, make a histogram showing the total number of shrimp you counted in each section of tubing.

Sirens Sleep Solution

Sirens Sleep Solution

Discover How To Sleep In Peace And Harmony In A World Full Of Uncertainty And Dramatically Improve Your Quality Of Life Today! Finally You Can Fully Equip Yourself With These “Must Have” Tools For Achieving Peace And Calmness And Live A Life Of Comfort That You Deserve!

Get My Free Ebook

Post a comment