Statement (A): The value of Z lies in the range of 0.1 to 0.2, regardless of the taxonomic group or the region.Statement (B): ‘Z’ values for entire continents are in the range of 0.6 to 1.2.

The value of Z lies in the range of 0.1 to 0.2, regardless of the taxonomic group or the region.  But, the species-area relationships among very large areas like the entire continents, the slope of the line to be much steeper (Z values in the range of 0.6 to 1.2).