Which of the following 3200-calorie diets is the least fattening
high fat diet
high carbohydrate diet
low carbohydrate diet
all of these choice are equally "fattening"
high protein diet

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.