You are perfusing the thick ascending limb, testing whether reabsorption of fluid is active. The perfusing fluid contains 10 cpm of methoxy inulin, which is not absorbed by the nephron. Removal of oxygen causes the rate at which fluid leaves the thick ascending limb to increase from 1 to 2 nanoliters per min, and the concentration of methoxy inulin in the fluid leaving the nephron segment falls from 20 to 10. Vin = volume rate of perfusate, nanoliters/min
Cin = concentration of methoxyinulin in the perfusate, measured in counts per minute
Vout = volume rate of fluid exiting the tubule, nanoliters/min
Cout = concentration of methoxyinulin in the perfusate, counts per minute
R = volume rate of fluid reabsorbed, nanoliters/min
Vin * Cin = Vout * Cout
Vin = Vout * Cout/Cin
R = Vin - Vout
True or False: Reabsorption of fluid by this tubule is active.
A. True
B. False

cuz they cant breath

explanation:

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the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.