Recall how alfred russel wallace theory compared to darwin's theory of evolution by natural selection. *who ever answers correctly hey answer*

Alfred Wallace and Charles Darwin where both the theorists behind the natural selection mechanism by which animals evolve to adapt in their environment. Distinctively, Wallace was the co-author of the theory by which his expeditions made him discover the processes that act on how evolution occurs which he relayed to Darwin. However, as both peers in the theory of evolution it seems to have arose that Wallace never became popular on this idea unlike Darwin. 

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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.