Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Chapter 56, Problem 13TYPSS
Suppose you had a small set of experimental ponds at your disposal and an array of pond-dwelling algae, plants, and animals. How could you use a radioactive isotope of nitrogen to study the effects of fertilizer runoff in these experimental ecosystems?
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Chapter 56 Solutions
Biological Science
Ch. 56 - Ture of false? An ecosystem comprises a community...Ch. 56 - Which of the following ecosystems would you expect...Ch. 56 - Which of the following is normally the...Ch. 56 - Prob. 3TYKCh. 56 - Devegetation has what effect on ecosystem...Ch. 56 - Prob. 4TYKCh. 56 - Prob. 7TYUCh. 56 - Explain why decomposition rates in a field in...Ch. 56 - Why are the open oceans nutrient poor? Why are...Ch. 56 - Prob. 8TYU
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- Organisms that damage crop plants are the most costly of introduced species. Weeds, pathogenic microbes, and arthropods that attack crops together account for half of the costs documented by Pimentel and his colleagues. What steps can we—farmers, governments, and all of us as a society—take to minimize the impacts of invasive species on crops?arrow_forwardWhich of the following best describes how using fertilizer would affect the nitrogen cycle? The use of fertilizer would result in more nitrogen in the groundwater. The use of fertilizer would result in less nitrogen in the soil. The use of fertilizer would result in more phosphorus in the soil. The use of fertilizer would result in more nitrogen being added to the carbon cycle.arrow_forwardHow might it be possible to cleanse an aging eutrophic lake? Consider chemical, biological, and physical approaches in your answerarrow_forward
- The image above is a screenshot taken from an online image sharing website, imgur, showing flowers that allegedly grew from the aftermath of the Fukushima Nuclear Powerplant disaster in 2011. Question: “Do you think this post provides strong evidence of the actual conditions of the area?”arrow_forwardcan someone please help me to answer questions a-b thank you 1In a trophic pyramid, each level is smaller than the one below. a) What does the size of each level represent? b) How much energy is transferred from level to level? c) Explain why the levels get smaller as the trophic pyramid goes up.arrow_forwardHeavy Metals were identified as environmental pollutants much earlier than most trace level organic pollutants. What is one or more? Describe if we have mitigated exposures to same in our region?arrow_forward
- Living 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 water in an ecosystem. Discuss both biochemistry and ecology in your answer. Include in your answer at least one way in which human activity has an impact on this nutrient cycle. What are the main reservoirs of water in the biosphere? PLEASE DO NOT PLAGIARIZE FROM ANY SITES PLEASE DO NOT JUST COPY AND PASTEarrow_forwardWhich statement offers the best explanation of how deforesting hubbard brooks watershed (W2) affected the nitrogen cycle? 1. Denitrification rates increased, resulting in a decrease in the export of ammonium 2. Microbial immobilization rates increased, resulting in a decline in stream nitrogen 3. Mineralization rates increased, causing the export of ammonium to increase 4. plant uptake nitrogen stopped, resulting in an increase in the export of nitratearrow_forwardQuestion 42 In which of these biomes is fire least important? Question 42 options: A) chaparral. B) temperate grasslands. C) alpine tundra. D) conifer forest. Question 43 Transpiration is the process by which Question 43 options: A) water is taken in by the roots. B) water evaporates from the stomata. C) water loss is prevented during photosynthesis. D) water enters an aquifer. Question 44 Lakes become stratified because Question 44 options: A) waters of different density tend to not mix. B) the epilimnion lies above the hypolimnion. C) the thermocline disappears. D) oxygen is limiting.arrow_forward
- Subject (Biology - Ecology) Question #1. By the definition of ecology and environmental studies, how does one depend on the other? Does one depend greater than the other? Which and why?arrow_forwardEarth has a total of 11.9 billion gha of productive land. How many people could Earth supportsustainably if the average ecological footprint were 8 gha per person (as in the United States)?arrow_forwardYour friend's cottage is on a lake that has experienced numerous blooms of cyanobacteria (blue green algae) in recent years. Which chemical is most likely responsible for these blooms? methane phosphorus iron nitrogen carbon dioxide Previous PageNext Pagearrow_forward
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