1. Did all the bacterial colonies on the countable plate(s) have a similar appearance? If not, how do you explain this

2. What is the formula for population density? Explain what each part of the equation means.

3. What errors can occur while performing a serial dilution / direct plate counting method?

4. What is the population density if you have 73 CFU, the dilution was 10x-4, and the inoculation volume was 0.1ml?

5. What is an advantage and a disadvantage to direct counting methods?