Question

antibiotics are substances that can prevent bacteria from growing. in his laboratory, lee prepared 15 petri dishes, which are used to grow bacteria. five of the dishes contained no antibiotic, five contained a low concentration of antibiotic, and five contained a high concentration of one species of antibiotic. lee added an equal amount of one species of bacteria to each dish. he kept the dishes at 37°c, allowing the bacteria to grow overnight and form colonies in the dishes. the next day, lee counted the number of bacterial colonies that had grown on each dish. identify the question that the experiment can best answer. do more bacterial colonies grow on petri dishes with higher concentrations of antibiotic or lower concentrations? do more bacterial colonies grow at 37°c or at 25°c?

Explanation:

Step1: Analyze the experiment setup

The experiment involves Petri - dishes with different antibiotic concentrations and bacteria grown at different temperatures.

Step2: Identify research questions

The questions aim to find out the impact of antibiotic concentration and temperature on bacterial colony growth.

Answer:

1. Do more bacterial colonies grow on Petri - dishes with higher concentrations of antibiotic or lower concentrations?
2. Do more bacterial colonies grow at 37°C or at 25°C?