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Biology: The Dynamic Science (Mind...

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

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

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

Nutrient runoff from fertilizing lush lawns often causes “algal blooms” in nearby lakes, making swimming impossible. The fertilizer components most likely to have caused the blooms are:

a. iron, magnesium, and nitrogen.

b. nitrogen, phosphorus, and sulfur.

c. nitrogen, potassium, and phosphorus.

d. selenium, magnesium, and potassium.

e. nitrogen, magnesium, and nickel.

Summary Introduction

Introduction:

An algal bloom is a rapid accumulation in the algal population in fresh or marine water, and is identified by discoloration in water from their pigments. Blooms can affect animals or the ecology, and make cities to cut off water for residents. Algal blooms can block the sunlight for other organisms and can reduce the oxygen levels in water. Also, few algae produce poison in water.

Explanation

Justification/explanation for the correct answer:

Option (c) is given as nitrogen, potassium, and phosphorous include plant nutrients, all of which are essential macronutrients used in fertilizers. So, the option “nitrogen, potassium, and phosphorous” cause the algal blooms. Hence, option (c) is correct.

Explanation for the incorrect answer:

Option (a) is given as iron, magnesium, and nitrogen include plant nutrients, one of which is iron that is a secondary macronutrient, and the other one is magnesium, which is a micronutrient, both are used in fertilizers. So, it is an incorrect option.

Option (b) is given as nitrogen, phosphorous, and sulfur include plant nutrients, one of which is sulfur that is a secondary macronutrient, used in fertilizers...

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