Explain why microbial growth refers to an increase in cell number rather than cell size. 2. If a bacterium has a generation time of 30 minutes, and you start with 100 cells at time 0, how many cells will you have in 30, 60, 90, and 120 minutes? +

Part 1, Bacteria cell starts dividing as it grows in size

Part 2 ,

After 30 minutes  

After 60 minutes

After 90 minutes

After 120 minutes

Explanation:

Part 1

Microbes particularly bacteria are one celled living species. Whenever the size of bacterium increases and it crosses the threshold limit, it divides into two cells.

Thus growth in bacterium population refers to the increase in the number of cell rather than its size.

Part 2

Give

generation time minutes

Thus, after every minutes the cell will divide and increase in number

Thus

At time t , number of bacteria

At time t minutes , number of bacteria

At time t minutes , number of bacteria

At time t minutes , number of bacteria

At time t minutes , number of bacteria