There are two test tubes of yeast in this experiment. Both test tubes contain the same amount of water and sugar. The first test tube also contains a population of brewer’s yeast, represented by the line on the graph. The second test tube contains brewer’s yeast plus another yeast species.

Question

View the brewer’s yeast population size in the second test tube by dragging the “Volume of Brewer's yeast grown in a mixed population” attribute from the case card to the y-axis, where you see a plus sign. You should now see two lines on your graph. Use this graph to answer Questions 3-5.

3
How did adding a second yeast species affect the growth of the brewer’s yeast population?

Answer 1

To accurately answer how the addition of a second yeast species affected the growth of the brewer's yeast population, I would need to see the graph you're referring to. However, I can provide some general insights based on typical outcomes in such experiments.

1. Increased Competition: If the second yeast species competes for the same resources (water, sugar), it may limit the growth of the brewer’s yeast population. You might see a decrease in the growth rate or a lower maximum population size for the brewer's yeast in the mixed population.

2. Synergistic Effects: Alternatively, the second yeast species might have a positive effect on the brewer's yeast population, possibly by outcompeting other unwanted microorganisms or by creating conditions that favor the growth of brewer's yeast (such as altering the local environment).

3. No Significant Change: It's also possible that the presence of the second species does not significantly affect the brewer's yeast growth, indicating that they can coexist without negatively impacting each other.

If you can summarize the graph's findings or share details on whether the brewer's yeast population increased, decreased, or remained stable when the second species was added, I can provide a more specific analysis.