A student carries out an investigation on a strain of bacteria that is used to decompose oil spills. She keeps all the solution in a lighted incubator at a temperature of 22 degree C. After three days she removes the samples and counts the number of bacteria in each. which question is the student investigating?
![A student carries out an investigation on a strain of bacteria that is used to decompose oil spills She keeps all the solution in a lighted incubator at a tempe class=](https://us-static.z-dn.net/files/dfa/ab4f111d363e6a8e969f758fda118aca.png)