Aperson is declared to be dead upon the irreversible cessation of spontaneous body functions: brain activity, or blood circulation and respiration. however, only about
1% of a person’s cells have to die in order for all of these things to happen. how can someone be dead when 99% of his or her cells are still alive?

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.