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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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 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_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
- What are the consequences of having an excess of nutrientssuch as nitrates and phosphates running into a freshwater reser-voir in the process of eutrophication?(a) It could lead to an excess of algal and plant growth.(b) It could lead to a decrease in sunlight penetration andan increase in BOD.(c) It could lead to a long-standing rich and diverse growthof more plants and animals.(d) Both a and b.(e) Both b and c.arrow_forwardA salmon feeds on crabs and small fishes, which in turn feed on zooplankton that feed on phytoplankton which in turn uses up nitrates in the water. If there are overfishing of salmons, which things should decrease? a. zooplanktonb. small fishc. phytoplanktond. a and de. b and carrow_forwardThe mussels that live at the NW Eifuku volcano are examples of _______. a. chemoautotrophs b. photoautotrophs c. apex predators d. primary 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_forwardThe primary producers in an ocean grazing food web are usually ________. a. plants b. animals c. fungi d. phytoplanktonarrow_forwardIn most ecosystems, the primary producers use energy from______ to build organic compounds. a. sunlight b. heat c. breakdown of wastes and remains d. breakdown of inorganic substances in the habitatarrow_forward
- When biological oxygen demand (BOD) becomes very high:(a) The amount of dissolved oxygen increases(b) The concentration of microbes decreases(c) The water becomes anaerobic(d) The diversity of aquatic life flourishesarrow_forwardThe 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 fuelsarrow_forwardThe second trophic level in a lake is(a) Phytoplankton(b) Zooplankton(c) Benthos(d) Fishesarrow_forward
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