Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337670319
Author: STARR
Publisher: Cengage
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Chapter 46, Problem 8SQ
Summary Introduction
Concept introduction: Carbon is the most abundant substance in living things. In the carbon cycle, carbon circulates among Earth’s atmosphere, oceans, rocks, and soils, and into and out of food webs.
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The main cause of the increase in the amount of CO2 in Earth’satmosphere over the past 150 years is(A) increased worldwide primary production.(B) increased worldwide standing crop.(C) an increase in the amount of infrared radiation absorbedby the atmosphere.(D) the burning of larger amounts of wood and fossil fuels
The 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.
The effect of CO2 emissions from burning fossil fuels is likely to bea. nothing; photosynthesis by plants will remove all the added CO2 from the atmosphere.b. nothing; the carbon cycle will simply run faster.c. planetary warming due to an increased greenhouse effect.d. planetary cooling due to a reduced greenhouse effect.
Chapter 46 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 46 - Changes in the Air To assess the impact of human...Ch. 46 - Prob. 2DAACh. 46 - Prob. 3DAACh. 46 - Prob. 4DAACh. 46 - In most ecosystems, the primary producers use...Ch. 46 - Organisms at the lowest trophic level in a...Ch. 46 - Prob. 3SQCh. 46 - Prob. 4SQCh. 46 - Efficiency of energy transfers in aquatic...Ch. 46 - Prob. 6SQ
Ch. 46 - Earths largest carbon reservoir is _______. a. the...Ch. 46 - Prob. 8SQCh. 46 - Prob. 9SQCh. 46 - The _____ cycle is a sedimentary cycle. a....Ch. 46 - Earths largest phosphorus reservoir is _______. a....Ch. 46 - Prob. 12SQCh. 46 - Nitrogen fixation converts _______ to _______. a....Ch. 46 - Prob. 14SQCh. 46 - Prob. 15SQCh. 46 - Where does your drinking water come from? An...Ch. 46 - Scientists study bubbles trapped in ancient...Ch. 46 - Nitrogen-fixing bacteria live throughout the...
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- Which of the following is not a fossil fuel? a. natural gas b. coal c. wood d. petroleumarrow_forwardWhich biogeochemical cycle does not have a gaseous component but cycles from the land to sediments in the ocean and back to the land? (a) carbon cycle (b) nitrogen cycle (c) phosphorus cycle (d) hydrologic cycle (e) neither a nor c has a gaseous componentarrow_forwardHuman use of fossil fuels has what consequences? Group of answer choices a. increase in CO2 concentration in the atmosphere b. return of fossilized carbon to the active carbon cycle c. increase in global temperatures d. all of the other optionsarrow_forward
- Which of the following natural forces is responsible for the release of carbon dioxide and other atmospheric gases? a. the Milankovitch cycles b. volcanoes c. solar intensity d. burning of fossil fuelsarrow_forwardWhy does an urban park full of trees have a greater cooling effect than an equal-sized urban golf course covered in grass? Pick the BEST answer a) Because trees sequester carbon into their wood b) Because trees photosynthesize c) Because trees create temperature differentials that improve airflow d) Because trees transpire producing evaporative cooling and grass does notarrow_forwardIf there are many greenhouse gases, why is only carbon dioxide considered a cause of global warming?a. The other gases do not cause global warming.b. It isn’t. Scientists are concerned about other causes; for example, release of methane from melting permafrost could have significant effects on global warming.c. Other gases occur in such low quantities that they have little effect on the climate.d. Carbon dioxide is the only gas that absorbs long-wavelength infrared radiation.arrow_forward
- Solar radiation plays the most important role in the: (A) Water cycle (B) Nitrogen cycle (C) Carbon cycle (D) Oxygen cyclearrow_forwardGreenhouse gases function by (a) blocking sunlight but letting out heat from Earth to outer space. (b) absorbing heat that radiates from Earth that would otherwise escape to outer space. (c) absorbing heat that radiates from the sun toward Earth. (d) releasing heat that radiates from Earth into outer space.arrow_forwardThe burning of fossil fuels releases CO2 into the atmosphereand is detrimental to the Earth’s ecosystems. Explain whythe use of biofuels, which also release CO2, is an improvement over fossil fuels.arrow_forward
- Understanding that carbon cycles, what action could we do in order to remove carbon from the atmosphere? Group of answer choices a. Dig up less coal b. Discard less plastic in ocean surface water c. Clean up more leaf litter and animal waste d. Plant more treesarrow_forwardEarth’s largest carbon reservoir is______ . a. the atmosphere c. seawater b. sediments and rocks d. living organismsarrow_forward2)The greastes effect that hmans have on the carbon cycle derives from A) the production of methane from domestic cattle B) all of these C) the production of CFCs D) runoff of fertilizers from agriclture E) the burning of fossil fuelsarrow_forward
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