In which of the following species should natural selection favor the highest proportion of juxtamedullary nephrons? a. a river otter b. a mouse species living in a temperate broadleaf forest c. a mouse species living in a desert d. a beaver

Video transcript

Hello everyone here we have a question asking what is an excretion related adaptation trade found in desert animals? A a high percentage of cortical net franz be a high percentage of Justin medullary net franz. See a low percent of Justin regulatory net franz or D. Both A and C. So just to mega larry net franz are responsible for generating and maintaining strong osmotic gradient for re absorption. And desert animals need to excrete highly concentrated urine because they do not have great access to water. So we need a high percentage of just a media larry Neff franz to keep up that concentrated urine. So our answer is B. A high percentage of Justin Guarini franz. Thank you for watching. Bye.