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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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Body fluids of a marine bony fish have a solute concentration that is ___ its surroundings.

  1. a. higher than
  2. b. equal to
  3. c. lower than

Summary Introduction

Introduction: The animals tend to get adaptation to their environment in order to survive themselves. Hypertonic environment of the ocean is the selective pressure that shaped the kidney of these animals most efficiently to remove the toxins with less water. Marine animals live in a hypertonic environment of the ocean. Ocean contains higher solute concentration. Freshwater fish take in water by osmosis, so they produce a large volume of urine. By contrast, marine fish lose water by osmosis and produce little urine.

Explanation

Reasons for the correct statement:

Body fluids of marine bony fish are less salty (due to less solute concentration) than seawater. A marine fish continually loses water by osmosis across its body surfaces. It replaces this lost water by gulping seawater, then pumping salt out across its gills.

Hence, option c. is correct.

Reasons for the incorrect statement:

Option a. is given as “higher than”...

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