Question

1. a student suggests that a certain species of bacteria grows better in the light than in the dark. the student has 10 containers on which to grow the bacteria. which of the following would be the best experiment to test this idea?

○ grow 10 containers in the light with extra water

○ grow 5 containers in the dark and 5 containers in the light

○ grow 10 containers in the dark

○ grow 10 containers in the light

Explanation:

To test if bacteria grow better in light than dark, we need a controlled experiment with a light (experimental) group and a dark (control) group. The other options either lack a control group (growing all in light/dark or with extra water which introduces another variable) or don't compare light and dark. Growing 5 in dark and 5 in light allows a direct comparison of the effect of light.

Answer:

B. Grow 5 containers in the dark and 5 containers in the light