Before 1800, most peppered moths in england were light-colored. during the industrial revolution, soot and industrial wastes darkened tree trunks. gradually, the light-colored moths became rare, and the dark-colored ones became abundant. what role did natural selection play?

a. natural selection created the variation in the population, and then acted accordingly.
b. natural selection acted on the variation that was present in the population.
c. natural selection acted indiscriminately on both color variations.

If animal agriculture was eliminated, how much grain would become available for human consumption?

Apuppy’s tendency to chew is inherited through which of the following? a. through learned behavior b.through genes c. through seasonal cycles d. through hibernation

The us council on environmental quality, the world wildlife fund of the united states, the ecological society of america, the smithsonian institution, and the international union for the conservation of nature have proposed four principles of wildlife conservation. which of the following does not apply to wildlife conservation? a) continuous monitoring, analysis, and assessment b) ecosystem maintenance that includes wildlife c) a plan encompassing entire communities of organisms and all renewable resources d) a continued interest in harvesting populations for sport