A group of biology students tests the growth of bacteria under different conditions. The students apply the same amount of bacteria to identical Petri dishes enriched with nutrients, then place each plate at a different temperature. The bacteria are allowed to grow for three days, after which the number of bacterial colonies on each plate is counted. What is the dependent variable in this experiment?

A.
the number of bacterial colonies after three days
B.
the temperature at which the colonies grew
C.
the nutrient type present in the Petri dishes
D.
the time of day that the experiment is performed

Question

contestada

Respuesta :

guyscaff37773 guyscaff37773 · Answer 1 · 2020-11-06T10:30:35+01:00

Answer:

Answer is A

Explanation:

Answer Link

priyankatutor priyankatutor · Answer 2 · 2021-12-17T11:20:40+01:00

The number of bacterial colonies after three days is a dependent variable in the given experiment. Option A is correct.

Dependent variable:

It is the variables in the experiment that depend up on the cause independent variables.

For example: The number of bacterial colonies after three days.

Independent variables:

It is the variables in the experiment that can be changed or manipulate.

For example; temperature, amount of nutrients etc.

Therefore, the number of bacterial colonies after three days is a dependent variable in the given experiment.

To know more about variables,

https://brainly.com/question/787279