A certain bacterium was cultured for several generations in medium containing 15n, transferred to medium containing 14n, and allowed to complete two rounds of cell division. Given that the bacterium’s genome mass is 5. 4 fg when grown in 14n media and 5. 5 fg when grown in 15n medium, individual bacteria with which of the following genome masses would most likely be isolated from this culture?.

Yes it can cause that

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.