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Concept explainers
To determine: The number of times the nitrate runoff was greater than the runoff in the neighboring undisturbed area.
Introduction: The ecosystem is defined as the interaction of plants and animals with their environment. All the components of the ecosystem make a community in which all the components are connected and interact with each other.
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Explanation of Solution
The clearing of the forest cover of Hubbard Brook in the year 1965 and 1966 lead to a runoff of a large amount of water which was about 40% of the water present in the valley. The amount of nutrient that was eroded also increased. The change in the quantity of nitrogen in the disturbed valley was different from the undisturbed part of the valley. The undisturbed area has accumulated about 5kg per hectare of nitrate per year but in two years the runoff leads to a loss of about 53 kg of nitrate per year. The nitrate concentration in the stream water also rapidly increased due to runoff. The fertility of the soil in the valley decreased strikingly.
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Chapter 56 Solutions
Biology
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- 18. Watch this short youtube video about SARS CoV-2 replication. SARS-CoV-2 Life Cycle (Summer 2020) - YouTube.19. What is the name of the receptor that SARS CoV-2 uses to enter cells? Which human cells express this receptor? 20. Name a few of the proteins that the SARS CoV-2 mRNA codes for. 21. What is the role of the golgi apparatus related to SARS CoV-2arrow_forwardState the five functions of Globular Proteins, and give an example of a protein for each function.arrow_forwardDiagram of check cell under low power and high powerarrow_forward
- a couple in which the father has the a blood type and the mother has the o blood type produce an offspring with the o blood type, how does this happen? how could two functionally O parents produce an offspring that has the a blood type?arrow_forwardWhat is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forward
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