Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

In which habitat mush organisms adjust regularly to changing salinity?

a. salt marsh

b. coral reef

c. benthic province

d. estuary

e. riffle

Summary Introduction


The aquatic water bodies may have freshwater or saline water, depending on their location and the adjoining land area. The organisms in these water bodies are adapted accordingly. However, a few water bodies may be intermediate to the freshwater or saline water and may require the inhabitants to adjust regularly with the changing salinity.


Justification/Explanation for the correct answer:

Option (d) is estuary. Estuaries are formed at the river mouth where they meet the oceans or seas. Since the rivers carry freshwater and the seas have high salinity, the organisms have to regulate their body's metabolism and physiology accordingly with the fluctuating salinity. Hence, option (d) is correct.

Explanation for the incorrect answers:

Option (a) is salt marsh. The salt marsh is formed in the coastal region in the upper inter-tidal range between the land and the open sea water. The overall salinity is the same in these ecosystems, and the organisms are adjusted accordingly. So, it is an incorrect option.

Option (b) is coral reef. These ecosystems are considered the richest ecosystems in the world...

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