Question

Murray is observing a bacterial colony that is growing in agar in a petri dish. Agar is processed seaweed. Murray calculates that the population doubles in size every 32 hours. Which conclusion is supported by murray's observations? a. the agar and air in the petri dish are providing all of the resources needed by the bacteria. b. the bacterial colony is growing in all regions of the agar in the petri dish. c. the bacterial colony will continue doubling in size indefinitely. d. the agar and air in the petri dish are limiting factors on the growth of the bacterial colony.

Answer 1

The correct answer is: a. the agar and air in the petri dish are providing all of the resources needed by the bacteria.

There are four phases of bacterial growth:

1. Lag phase-bacteria prepare for reproduction

2. Log phase- cell doubling

3. Stationary phase- due to a growth-limiting factor

4. Death phase.