Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 46, Problem 3SQ
Summary Introduction
Concept introduction: An ecosystem is an arrangement of organisms and their physical environment, all interacting through a one way flow of energy with respect to the cycling of nutrients. It is an open flow system that requires ongoing inputs of energy and nutrients. In an ecosystem the trophic level represents the position of an organism in a food chain.
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All organisms at the top trophic level_______ . a. capture energy from a nonliving source b. obtain carbon from a nonliving source c. would be at the top of an energy pyramid d. all of the above
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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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- Flux of anthropogenic Phosphorous from terrestrial to aquatic ecosystems can have negative effects, such as A. Eutrophication B. Ocean acidification C. Acid rain D. Both A and C E. A, B and Carrow_forwardPlants use carbon dioxide from the air and are therefore called _____. a. consumers b. producers c. decomposer d. carbon fixersarrow_forwardThe primary producers in an ocean grazing food web are usually ________. a. plants b. animals c. fungi d. phytoplanktonarrow_forward
- The amount of energy available to heterotrophs is ________. Select one: a. net primary productivity (NPP) b. always equal c. kilocalories per unit area d. gross primary productivityarrow_forwardChemoautotrophic bacteria and archaea are the main primary producers for food webs______ . a. in mangrove wetlands c. on coral reefs b. at seamounts d. at hydrothermal ventsarrow_forwardThe cyanobacteria in Lake Erie would best be described as .a. decomposersb. tertiary consumersc. primary producersd. heterotrophse. secondary consumersarrow_forward
- Biological magnification occurs whena. pollutants increase in concentration in tissues at higher trophic levels.b. the effect of a pollutant is magnified by chemical interactions within organisms.c. an organism is placed under a dissecting scope.d. a pollutant has a greater than expected effect once ingested by an organism.arrow_forwardWhich of the following would not be included in a description of an organism’s niche? a. its trophic level b. the humidity and temperature it prefers c. when it reproduces d. its number of chromosomesarrow_forwardLakes and ponds that exhibit high levels of eutrophication typically are affected by too much A. Dissolved oxygen B. Nitrogen C. Carbon dioxide D. Sulfurarrow_forward
- The process whereby nitrogen is brought into organic molecules is called ________. a. nitrification b. denitrification c. nitrogen fixation d. nitrogen cyclingarrow_forwardOrganisms at the first trophic level ________. a. capture energy from a nonliving source b. are eaten by organisms at lower trophic levels c. are shown at the top of an energy pyramid d. are consumersarrow_forwardOrganisms at the lowest trophic level in a tallgrass prairie are all _______. a. two steps away from the original energy input b. autotrophs c. heterotrophs d. both a and b e. both a and carrow_forward
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