In which north american biome are you most likely to find andisols?

How many people in the world’s economy work in “system d”?

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.