It can be inferred from the passage,that which one of the following experimental results would suggest that bacteria ...

Emil-Kunkin on January 19, 2022

Hi Medas, in the last paragraph we are given a potential experiment in which we move bacteria from uniformly low to uniformly high concentrations of an attractant. We are told that this experiment can help us choose between two options: sensing across time, or sensing simultaneously. We are then told that in this experiment, if bacteria sense across time then we should see long smooth runs with few tumbles when moved to the new concentration. We are then told that if they sense simultaneously, we should see no change as a result in the change of concentration.

This question asks which experimental result would be consistent with the hypothesis that bacteria detect concentrations simultaneously. D and E are different setups so we know nothing about them. A is consistent with the other hypothesis (measuring across time) so that is wrong. C offers the option of no tumbling, which is mostly consistent with the other hypothesis as well. B tell us there was no change, which, according to the last paragraph of the passage, is what we expect to see for the simultaneously measurement hypothesis.