A research team has isolated a microorganism of a pond whose average temperature is 25 º C. When studying the location of the microorganism in the water column of the lake with respect to day-night cycles, researchers found the following result (solid line on graph).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjexO1XaR1BXFwNpBN7jn6Rey4ZLQmKkWCKOKTgIe6qXdEhPSZGcTwBmd0-1AhUybzqHKokPkpCX-oh5zHmR28CTzd48NMnx-der2hvG7_9FbuNYnjVcDpSzhinVkEgNYvyHhxiQ39rjIU/s400/microaerofilo.jpg)
In the laboratory the research group working with the organism isolated and determined the following data on their physiology and metabolism. It is a microaerophilic bacterium strict heterotrophic metabolism, whose optimum temperature is 25 º C. This research group attempts to reproduce in the laboratory the results observed in nature simulating cycles day and night in a column of water inoculated with this organism, which is placed in a chamber incubated aerobically at 25 ° C temperature and in which by simulated solar light day and night cycles but you get a completely different result (dashed line on graph): Microorganisms are always at the same depth.
a. - Develop a hypothesis to explain the result.
b. - Design an experiment in which you can check this hypothesis
a. - Develop a hypothesis to explain the result.
b. - Design an experiment in which you can check this hypothesis
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