Why does the human breathing rate increase when exercising?

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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.