genes are segments of DNA that determine the phenotype of an individual. Pea colors can be yellow or green. When two plants that produce yellow peas were crossed.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

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.