BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 59, Problem 6TY
Summary Introduction
Introduction: DDT (dichloro diphenyl trichloroethane) is an important insecticide which is used for the control of mosquito-borne malaria. DDT has various chemical properties that have an important ecological effect.
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As energy is transferred from one trophic level to the next, substantial amounts of energy are lost to/asa. undigestible biomass.b. heat.c. metabolism.d. All of the above.
Eutrophication in water bodies can lead to the formation of dead zones due to a depletion of
a.
oxygen.
b.
carbon.
c.
nitrogen.
d.
decomposers.
e.
phosphorus.
Of the total amount of energy that passes from one trophic level toanother, about 10% isa. respired and becomes heat.b. passed out as feces or urine.c. stored as body tissue.d. recycled to autotrophs.e. All of these are correct
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- The total amount of living tissue within a given trophic level is called the: O A. Biomass O B. Energy mass C. Organic mass O D. Trophic massarrow_forwardChemical fertilizers: a. supplement carbon fixation by crops. b. cause eutrophication. c. provide additional nitrogen for crops. d. provide additional phosphorous for crops. e. Only b. c. and d.arrow_forwardThe process of certain elements through different trophic levels is also called A. food chain B. biodiversity C. biogeochemical cyclingarrow_forward
- In an inverted trophic pyramid, biomass is present in the secondary carnivores than in the primary producers. Compared to terrestrial systems, aquatic systems are likely to feature inverted pyramids. A. more; much more B. more; about as C. more; much less D. less; much more E. less; much lessarrow_forwardNetprimary productivity is the primary productivity of an ecosystem, aftersubtracting energy lost in:a.dead plant tissues.b.inedible plant tissues.c.respiration by primary producers.d.respiration by primary consumers.e.inefficiencies of photosynthesis.arrow_forwardBiological 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_forward
- EcosystemA hasprimary production of 1000 g C /m2/yr and ecological efficiency of 10%. Ecosystem B has primary production of 300 g C /m2/yr and an ecological efficiency of 25%. a.Which ecosystem will have more production at thesecondary consumer (carnivore) trophic level? b.Which ecosystem is more likely to support an endothermic primary consumer (herbivore)? c.If atrophic level requires at least 1 gC/m2/yr in order to exist, how many trophic levels can each of these ecosystems support?d.Given your answer to part c, which do you thinkhas a larger impact on the energy available at upper trophic levels: primary productivity or efficiency of energy movement across trophic levels?arrow_forwardThe direction of the arrows in a trophic chain (as the one in the figure below) represents... A E O B) direction of movement of matter O Both B and C O A, B, and C O A) direction of consumption, from higher level consumer to lower level consumer O C) direction of movement of energy O Both A and Carrow_forwarda. 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_forward
- order the components to show how energy matter cycle through the kingfishers ecosystemarrow_forwardNitrogen availability is a limiting factor in crop production. * D. Disagree, because atmospheric nitrogen is about 80% and therefore nitrogen is readily available. A. Agree, because almost 80% of the atmospheric nitrogen (N2) is readily available. C. Agree, because atmospheric nitrogen must first be reduced to ammonia through N-fixation. B. Disagree, because only a small fraction of the atmosphere is composed of nitrogen gas.arrow_forwardBecause plants extract nutrients from soil and use sunlight as an energy source, they are considered to be a. autotrophs. c. heterotrophs. b. consumers. d. decomposers.arrow_forward
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