Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 20, Problem 8SQ
Local conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular
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a) Each trophic level, on average, will move 10% of the energy tied up in molecules to the next trophic level. How much of the energy from the sun is actually brought in to the first trophic level?
b) When the producers convert energy and tie it up in the first trophic level, it is brought in as heat. True or false?
c) Which of the following are true about ecosystems? Check all that apply.
They contain both living and nonliving components.They contain both living and nonliving components.
There is a transfer of energy through the system and some energy is lost as heat energy.There is a transfer of energy through the system and some energy is lost as heat energy.
Nutrients repeatedly cycle through the ecosystem.Nutrients repeatedly cycle through the ecosystem.
They represent the lowest level of biological organization.They represent the lowest level of biological organization.
The ultimate source of energy for most ecosystems is organic molecules.
Altered biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
a)How to control human activities to not increase the carbon dioxides level in the atmosphere and nitrogen levels in the biosphere ?
Which of the following best describes how using fertilizer would affect the nitrogen cycle?
The use of fertilizer would result in more nitrogen in the groundwater.
The use of fertilizer would result in less nitrogen in the soil.
The use of fertilizer would result in more phosphorus in the soil.
The use of fertilizer would result in more nitrogen being added to the carbon cycle.
Chapter 20 Solutions
Campbell Essential Biology (7th Edition)
Ch. 20 - Prob. 1SQCh. 20 - According to the concept of competitive exclusion,...Ch. 20 - Prob. 3SQCh. 20 - Prob. 4SQCh. 20 - Why are the top predators in food chains most...Ch. 20 - Over a period of many years, grass grows on a sand...Ch. 20 - According to the energy pyramid, why is eating...Ch. 20 - Local conditions, such as heavy rainfall or the...Ch. 20 - Prob. 9SQCh. 20 - Prob. 10SQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is a characteristic of terrestrial biomes? CHECK ALL THAT COULD APPLY A)annual average rainfall in excess of 25 cm B)they show strong latitudinal patterns C)specific microorganisms, fungi and animals D)the presence of photosynthetic organisms E)vegetation demonstrating vertical stratificationarrow_forwardDiscuss the valuable significance of some nutrients in an ecosystem.arrow_forwardUnder what conditions would you expect the lowest NPP in a terrestrial ecosystem? a)Cool temperatures, high precipitation b)Warm temperatures, low precipitation c)Cool temperatures, low precipitation d)Warm temperatures, high precipitationarrow_forward
- From the nitrogen cycle diagram below, which of the following is/are a process by which nitrogen can move into the dissolved ocean nitrogen pool? (Select all that apply) A- Denitrification B- Runoff C- Fossil fuel burning D- Agricultural N fixation E- Natural N fixationarrow_forwardWhich of the following are important biotic factors that can affect the structure and organization of an ecosystem? A)temperature, water B)nutrient availability, soil pH C)predation, competition D)precipitation, wind E)light intensity, seasonalityarrow_forwardWhy are nitrogen-containing molecules limited in the biosphere? Give two reasons.arrow_forward
- Classify each source of fixed nitrogen as Nonhuman or Human-related. Terrestrial fixation Marine Industrial Lightning Fossil fuels Crop fixation fixation fixation Nonhuman sources of N Human-related sources of Narrow_forwardPlant growth is limited by available nitrogen. Why is nitrogen fixation a limiting factor? There is very little nitrogen available after fossil fuel combustion utilizes the available nitrogen. Nitrogen must be produced by bacteria due to the inability of recycling by decomposers. There is no nitrogen in the atmosphere; it is only found in aquatic biomes. The stability of nitrogen gas makes it difficult to turn into nitrogen for living things.arrow_forwardRefer to Fig. 5.5. and redraw the important transformations of fixed nitrogen in ecosystems. Note the following processes: biological N fixation, non-biological N-fixation, ammonification, nitrification, denitrification. Reference: https://ecampusontario.pressbooks.pub/environmentalscience/chapter/chapter-5-flows-and-cycles-of-nutrients/arrow_forward
- Humid continental and humid subtropical climates both feature deciduous forest biomes. A major difference between these biomes is a) winter temperatures drop below freezing in the subtropical climate. b) trees grow taller in the continental region. c) continental climates are more humid. d) trees may not lose their leaves in winter in the subtropicsarrow_forwardWhy is an understanding of biogeochemical cycles essential in environmental science?arrow_forwardThe limiting nutrient in an ecosystem is the nutrient; that is the most scarce nutrient that is needed for more growth to occur that is limited however is not needed by many organisms in the system is almost always carbon dioxide is almost always nitrogen gasarrow_forward
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