How does precipitation become groundwater?

Groundwater begins as precipitation. Anywhere in the world, a portion of the water that falls as rain and snow infiltrates into the subsurface soil and rock. ... If the aquifers are porous enough to allow water to move freely through it, people can drill wells into the aquifer and use the water for their purposes.

my teacher would say no s

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.