Among the Following Choices, the Most Concentrated Urine is Excreted

Question

Among the following choices, the most concentrated urine is excreted by
A) frogs.
B) kangaroo rats.
C) humans.
D) desert tortoises.
E) birds.

Accepted Answer

Kangaroo rats are adapted to living in dry environments and have very efficient kidneys that produce highly concentrated urine, allowing them to conserve water. The other animals listed do not have as efficient kidneys and produce less concentrated urine.