Why are no organisms labeled between the end zone and 30 yard line on the left side of the field?

if youre reffering to the football field metaphor, the area between the end zone and the 30 yard line is the time before "the big boom" or precambrian period. There were no living organisms at this time but soon after, bacteria showed up.

Explanation:

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.