they are strongest between latitudes of 30°N and 60°N. but they move every year, "following the sun".
. In mitosis the nuclear membrane breaks down and the centrosome
The aqueous bromothymol blue solution act as a pH indicator and turns blue only in case when the pH of the sample is above or equal to 7.6
Since the pH of the water at the surface of the lakes is higher and ranges between 7.5 to 8.5 the color of bromothymol turn blue.
Pollution from a near by city is your answer ;D
