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 observation that the relative frequencies of melanic to light peppered moths changes with the color of tree bark provides support for Blank______.Multiple choice question.human-induced selectionnatural selectionindustrial selectionindustrial pollution

Starting in 1850, when Europe become industrialized, the frequency of melanic forms of the peppered moth in populations Blank______ until they made up Blank______ of some population.Multiple choice question.increased; about 50%increased; almost 100%decreased; no more than 1%

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

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

Regarding the peppered moth, many studies have shown that in polluted areas, the Blank______ form of the moth is favored by natural selection, and in unpolluted areas, the Blank______ form of the moth is favored.Multiple choice question.toxic; nontoxicdark (melanic); light (peppered)nontoxic; toxiclight (peppered); dark (melanic)