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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Like desert rodents such as the kangaroo rat, marine mammals such as dolphins have highly efficient kidneys that produce only a tiny amount of very concentrated urine. What common selective pressure shaped this trait in these seemingly dissimilar animals?

Summary Introduction

To explain: What common selective pressure shaped the highly efficient kidneys that produce only a tiny amount of very concentrated urine in desert animal, such as kangaroo rat and marine mammals such as dolphins.

Concept introduction: Hot environment of deserts and hypertonic environment of the ocean are the selective pressure that shaped the kidneys of these animals most efficiently to remove the toxins with less water.

Explanation

The animals tend to get adapted to their environment in order to survive themselves. Kangaroo rat is a small rodent that lives in deserts of south-western North America. These animals get the water from the food as metabolic water. Their kidneys absorb nearly all water from the filtrate. Loop of Henle is a part of nephron responsible for water reabsorption...

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