Desert animals, such as the kangaroo rat, need to conserve water in their bodies. which of the following mechanisms is an efficient way of conserving water? a. exhaling carbon dioxide through the lungs
b. expelling more urine through the bladder
c. reabsorbing water in the nephrons

c. reabsorbing water in the nephrons

Explanation:

Desert biome is the one which receives very little annual rainfall. Due to scarcity of water the animals and plants are adapted to conserve the available  water. The kangaroo rats are the animals which are adapted to serve in the desert habitat. They can survive without drinking water. They get moisture by eating seeds. They do not sweat or pant in order to conserve water. Their excretory system is very efficient in conserving water. The kidneys only produce small amount of urine. They have long loops of henle in the nephron cells which is responsible for re-absorption of water.

it is a learned trait

explanation:

the answer is d.) homologous; have mammary glands