Human kidney contains approximately 1 million nephrons. The diagram shows the structure of OneSearch nephron. As the functional unit of the kidney and nephron is responsible for removing waste and excess water from the blood. The nephron also has the ability to conserve nutrients salt and water as needed and return them to the blood supply. How do the unique structures of the tubules in the nephron most likely help the kidneys perform its function?

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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.