Close examination of a healthy organ reveals a lining of several layers of cells. the layers do not contain any blood vessels and one surface of the cells lines the cavity of the organ. this tissue is a type of

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.