A biologist discovers a new species of organism adapted to living in a deep underground cavern that provides no source of free water.The organism is eyeless and covered by fur,and it has a four chambered heart with a closed circulatory system.What excretory system adaptations to this extreme environment might the biologist expect to find?
A)very long malpighian tubules
B)very short malpighian tubules
C)metanephridia with a large number of nephridiopores
D)nephrons with long loops of Henle
E)nephrons with short loops of Henle

Question

Quizplus · Accepted Answer

The presence of nephrons with long loops of Henle is an adaptation seen in organisms that need to conserve water, as it allows for the production of highly concentrated urine. This would be beneficial in an environment with no source of free water. Malpighian tubules are found in insects, and metanephridia are found in annelids, neither of which matches the described organism with a four-chambered heart and closed circulatory system, which suggests it is more closely related to mammals.

A Biologist Discovers a New Species of Organism Adapted to Living