The reversal of melanism after the introduction of pollution control laws has been observed Blank______.Multiple choice question.in both Europe and North Americaonly in limited areas of the United States (e.g. Detroit)only in Englandonly in Europe

What recent observation has prompted scientists to challenge Tutt's hypothesis about the cause of industrial melanism?Multiple choice question.Reversal of industrial melanism is not correlated with the re-appearance of lichens.Selection against melanism in recent years seems to be correlated to the disappearance of pollution.Selection for melanism in recent years is not correlated with the color of tree trunk

Where has industrial melanism been observed?Multiple choice question.Throughout Eurasia and North AmericaOn a few large islands (for example Great Britain)In several European countries only

Scientists have observed that when air pollution is significantly reduced, the frequency of the melanic form of peppered moths Blank______.Multiple choice question.decreasesrandomly fluctuatesincreasesremains constant

The most commonly accepted hypothesis that explains industrial melanism and the reversal of industrial melanism is that Blank______.Multiple choice question.moths with coloration that matches their background are less susceptible to predation by birdspollution causes the leaves of trees to fold, providing less resting places for the light colored mothspollution tends to kill off light colored trees which are typically used by light colored moths

In certain polluted areas of the world, populations of moths have been shown to change over the years with dark forms becoming more abundant than light forms; this phenomenon is called Blank______.Multiple choice question.industrial melanismartificial melanismpollution melanismnatural melanism