On which of these landforms is the highest concentration of the russian population found?

The highest Russian population is found on the West Siberian Plain. The West Siberian Plain is approximately  6 kilometres from west to east and  670 kilometres from north to south. Half of the plain’s territory is elevated below 200 meters.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

yes we can.   a lady urinates from her urethra.