EBK BIOLOGY
6th Edition
ISBN: 9780134819150
Author: Maier
Publisher: VST
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Chapter 16, Problem 12LTB
Summary Introduction
Introduction:
An ecosystem refers to a community of living species in combination with the non-living constituents of the environment. These biotic and abiotic constituents are associated together via energy flows and nutrient cycles.
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The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a
plant without a nitrogen-fixing relationship, such as corn, is planted. After the
harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the
nitrogen-fixing plant, however, it is plowed under. The cycle continues in this
manner. Why would nitrogen-fixing plants be plowed under instead of
harvested? *
To increase water retention.
Nitrogen-fixing plants are not a food crop.
To increases usable nitrogen in the soil.
To decrease bacteria in the soil.
Plant growth is most likely to be limited by the available supply of usable: a. nitrogenb. carbonc. oxygend. phosphorus
Plant growth is limited by available nitrogen. Why is nitrogen fixation a limiting factor?
There is very little nitrogen available after fossil fuel combustion utilizes the available nitrogen.
Nitrogen must be produced by bacteria due to the inability of recycling by decomposers.
There is no nitrogen in the atmosphere; it is only found in aquatic biomes.
The stability of nitrogen gas makes it difficult to turn into nitrogen for living things.
Chapter 16 Solutions
EBK BIOLOGY
Ch. 16 - Prob. 1LTBCh. 16 - Compare and contrast the species interactions of...Ch. 16 - Prob. 3LTBCh. 16 - Current rates of species extinction appear to be...Ch. 16 - According to the generalized species-area curve,...Ch. 16 - Prob. 6LTBCh. 16 - Prob. 7LTBCh. 16 - Which of the following is an example of a...Ch. 16 - Prob. 9LTBCh. 16 - Prob. 10LTB
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- The limiting nutrient in an ecosystem is the nutrient; that is the most scarce nutrient that is needed for more growth to occur that is limited however is not needed by many organisms in the system is almost always carbon dioxide is almost always nitrogen gasarrow_forwardPlants obtain ______ by taking it up from the air. a. nitrogen c. phosphorus b. carbon d. waterarrow_forwardHow can soil erosion lead to desertification? It reduces the level of organic matter It promotes flooding that destroys vegetation It promotes salinization that destroys soil structure Which of the following is not a factor that may lead to urban sprawl? Pollution Immigration Overpopulation Which statement is NOT true about soil salinization? Soil dehydrates due to decrease in accumulation of water underground. Starts by attempting to wash the salts out of the topsoil by pumping more water. Results to the damage and killing of plants as saline water surrounds its deep roots. Which would most likely happen if too much nutrient entered a freshwater ecosystem? Algae will decrease, leaving few food resources, for fish. Nutrients would sink to the bottom, increasing soil deposition. Algae breakdown lowers dissolved oxygen, causing fish to suffocate.arrow_forward
- The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relatiorhip, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested? * To increase water retention. O Nitrogen-fixing plants are not a food crop. To increases usable nitrogen in the soil. To decrease bacteria in the soil.arrow_forwardSelect all that apply: Which process(es) create(s) a solube form of nitrogen that plants can take up from the soil? nitrogen fixation ammonification nitrification denitrificationarrow_forwardHuman Activity Effects on Soil Quality Effects on Soil Quantityarrow_forward
- All of the following are reasons why tropical rain forests less likely to grow back as secondary growth forests after widespread deforestation (when compared to temperate forests) EXCEPT: Question 25 options: - All of the above are significant reasons why tropical rain forests may not grow back after widespread deforestation. The soil of tropical rain forests contains much less organic matter and nutrients compared to the soil of temperate forests. - The trees in tropical rain forests are largely responsible for returning water vapor back to the atmosphere through evapotranspiration, so when they are gone, the rains come less frequently. - A larger percentage of the nutrients in a tropical rain forest system are stored in the trees themselves than in temperate forests. - Almost all tropical rain forest species are wind-pollinated, which is less reliable than insect-pollination so tree reproduction is affected more by “chance.”arrow_forwardIf there are fewer plants and therefore less transpiration in a given area, what will happen to the humidity or cloud cover in this area?arrow_forwardState whether the following is True or False of the process of eutrophication from the overuse of fertilizers. Group of answer choices Eutrophication often starts with stimulating algal growth [ Choose ] TRUE FALSE Eutrophication results in loss of dissolved oxygen from the process of photosynthesis [ Choose ] TRUE FALSE It is the decomposition of algae after algal blooms that lead to bacterial growth causing a loss of oxygen [ Choose ] TRUE FALSE Eutrophication is a natural process and can occur in the absence of fertilizers [ Choose ] TRUE FALSEarrow_forward
- Refer to the image: Discuss the succession of decomposers in your setups and explain the role of decomposers in the degradation of plant material. *The decomposing material is only the scraps of the plants, soil is not added.*arrow_forwardWhat is the importance of decomposition to nutrient cycling?arrow_forwardRead the article “Food and Climate” by clicking this link below http://klimat.czn.uj.edu.pl/enid/2__The_climate_change_issue/-_climate_change_effects_on_plants_266.html After reading the article Food and Climate, share your thoughts about the impact climate change may have on the farming community in Ontario with this question: What role do you play in preserving the diversity of plants throughout the world?arrow_forward
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