BIOLOGY W/CONNECT >IP<
11th Edition
ISBN: 9781259910487
Author: Raven
Publisher: MCG CUSTOM
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Chapter 57, Problem 4U
Nitrogen is often a limiting nutrient in many ecosystems because
a. there is much less nitrogen in the atmosphere than carbon.
b. elemental nitrogen is very rapidly used by most organisms.
c. nitrogen availability is being reduced by pollution due to fertilizer use.
d. most organisms cannot use nitrogen in its elemental form.
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If earth is filled in di-nitrogen gas, why is the productivity of so many ecosystems limited b availability of nitrogen
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Chapter 57 Solutions
BIOLOGY W/CONNECT >IP<
Ch. 57 - Which of the statements about groundwater is NOT...Ch. 57 - Photosynthetic organisms a. fix carbon dioxide. b....Ch. 57 - Prob. 3UCh. 57 - Nitrogen is often a limiting nutrient in many...Ch. 57 - Prob. 5UCh. 57 - Prob. 6UCh. 57 - Inverted ecological pyramids of real systems...Ch. 57 - Prob. 8UCh. 57 - Prob. 9UCh. 57 - The equilibrium model of island biogeography...
Ch. 57 - Based on results from studies at Hubbard Brook...Ch. 57 - According to the trophic cascade hypothesis, the...Ch. 57 - At Cedar Creek Natural History Area, experimental...Ch. 57 - Given that ectotherms do not utilize a large...Ch. 57 - Given that, in general, energy input is greatest...Ch. 57 - Prob. 3SCh. 57 - Explain several detailed ways in which increasing...
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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 statement best explains why persistent, fat-solublechemicals such as methylmercury accumulate in the highesttrophic levels?a. Animals at the highest trophic levels eat the lowest-quality food.b. The amount of biomass increases in each trophic level, and largeorganisms accumulate the most methylmercury.c. Large organisms are often herbivores, so they would consumemethylmercury directly.d. Methylmercury does not leave an animal’s body; each predatortherefore consumes the mercury contained in many prey.arrow_forwardLocal conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular terrestrial ecosystem, but the amount of carbon available to the ecosystem is seldom a problem. Why?arrow_forwardThe recent increase in atmospheric CO2 concentration is mainly a result of an increase in a. plant growth. b. the absorption of heat radiating from Earth. c. the burning of fossil fuels and wood. d. cellular respiration by the increasing human population.arrow_forward
- a. What factors cause energy to decrease with each trophic level?b. How is it possible for energy to be lost and the ecosystem to stillrun efficiently?c. Are the nutrients on the earth a renewable resource? Why or why not?arrow_forwardWhy are nitrogen-containing molecules limited in the biosphere? Give two reasons.arrow_forwardThe chronosequence of soil age across the Hawaiian Islands shows which of the following patterns of nutrient change? a. nitrogen and phosphorus increase continuously b. botth nitrogen and phosphorus start high then decrease c. nitrogen increases to a peak, then declines, while weatherable phosphorus declines to low levels fairly quickly (in geological terms) d. phosphorus increases continuously but nitrogen reaches a peak and then declinesarrow_forward
- Answer the following: a. What is a nutrient cycle? b. What are the different types of nutrient cycles, and describe each briefly. c. What is the importance of the different nutrient cycles on Earth?arrow_forwardFrom 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_forwardThelargest reservoir of phosphorus in most ecosystems is phosphorus:a. inthe atmosphere.b.dissolved in water.c. inrocks and sediments.d.bound in animal tissues.e.bound in plant tissues.arrow_forward
- Describe three pathways for the utilization of atmospheric nitrogen. Is human activity a significant factor? Explainarrow_forwardLiving organisms play an important role in the recycling of many elements within an ecosystem. Discuss how various types of organisms and their biochemical reactions contribute to the recycling of either carbon or nitrogen in an ecosystem. Include in your answer one way in which human activity has an impact on the nutrient cycle you have chosen.arrow_forwardFigure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forward
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