ECOLOGY
EXCRETORY PRODUCTS AND THEIR ELIMINATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
a mouse species living in a temperate broadleaf forest
|
|
|
a mouse species living in a tropical rain forest
|
|
|
a mouse species living in a desert
|
|
|
a river otter
|
Detailed explanation-1: -Natural selection favors the organisms that live in the desert to develop the highest proportion of juxtamedullary nephrons. Therefore, the desert mouse comprises a more significant number of juxtamedullary nephrons than the other animals.
Detailed explanation-2: -Kangaroo rats are desert animals and must conserve water at all costs. Therefore, you would expect them to have more juxtamedullary nephrons than humans do. The juxtamedullary nephrons contain long loops of Henle that produce very concentrated urine which helps desert animals conserve water.
Detailed explanation-3: -The renal corpuscle of the juxtamedullary nephrons is found in the renal medulla.
Detailed explanation-4: -Explanation: In desert mammals, juxtamedullary nephrons are present because they have a very long loop of Henle which helps in the reabsorption of water as more as possible.
Detailed explanation-5: -In humans, about 85% of the nephrons are cortical nephrons and about 15% are juxtamedullary nephrons.