(8 pts) When microorganism A and B are grown in pure culture, the growth curves

Question

(8 pts) When microorganism A and B are grown in pure culture, the growth curves below are observed. The interactions between microorganism A and B are described as commensalism when they are grown in a culture together. Determine the expected growth curve for microorganism A and B when they are grown in combination. Draw these curves on the graph below indicated with the microorganism (A or B) and the subscript c (i.e. Ac and Be). Focus on relative changes, i.e. the exact increases or decreases in growth are not important. 8. Note: If there is no expected change in the growth curve after the microorganisms are combined, simply add the appropriate notation next to the existing growth curve. Time

Explanation / Answer

In commensalism, one organism gets benefited and other organism neither get harm nor get benefit. The growth curve of above graph is correct.

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