SAT Subject Biology Practice Question 94: Answer and Explanation

Next steps

Question: 94

4. The loop of Henle is a structure within the urinary tract responsible for reabsorbing water. Compared to a terrestrial species, how might this structure appear in a freshwater aquatic species?

A. Absent
B. Longer
C. Shorter
D. Withered
E. Thinner

Correct Answer: C


Freshwater aquatic animals require less ability to reabsorb water than do terrestrial or saltwater species, which require a greater capacity for water reabsorption and thus a longer loop of Henle.

Previous       Next