Examine the figure below and answer the following questions using the letters below (type, A, B, C, or D in the blanks) a. Which zone has the lowest Biological Oxygen Demand? b. Which zone has the lowest Dissolved Oxygen? c. Which zone has the highest Biological Oxygen Demand? d. Which zone shows the greatest change in Dissolved Oxygen?
Examine the figure below and answer the following questions using the letters below (type, A, B, C, or D in the blanks) a. Which zone has the lowest Biological Oxygen Demand? b. Which zone has the lowest Dissolved Oxygen? c. Which zone has the highest Biological Oxygen Demand? d. Which zone shows the greatest change in Dissolved Oxygen?
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter20: Ecosystems And The Biosphere
Section: Chapter Questions
Problem 1ACQ: Figure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification...
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Distribution of water into zones
Water bodies are divided into different zones according to the presence of flora and fauna.
The following are
1-Clean zone: Water is clear than in other zones. It has high dissolved oxygen and very low biological oxygen demand.
2-Decomposition zone: In this zone decomposition of waste or algal bloom takes place, so dissolve oxygen goes down, and biological oxygen demand increases.
3-Septic zone: In this zone, only bacteria for decomposition is survived, and all other organisms are absent. It has the very lowest dissolved oxygen.
4-Recovery zone: In this zone, decomposition stops. Recovering of dissolved oxygen starts.
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