Answer
O. tauri: 8,000 genes/13,000 kb = 0.62
E. coli: 4,300 genes/4639 kb = 0.93
A. thaliana: 25,500 genes/ 119,200 kb = 0.21
The gene density of O. tauri is lower than E. coli, but greater than A. thaliana
Work Step by Step
To find gene density: # genes / # base pairs