If the onset of a light reliably signals the onset of food, a rat in a Skinner box will work to turn on the light. In this case, the light is a reinforcer.

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

This rapid change in species that rarely leaves behind fossil evidence is referred to as