MasteringBiology With eText - Access
7th Edition
ISBN: 9780321911940
Author: Johnson
Publisher: PEARSON
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Chapter 23, Problem 13TY
Summary Introduction
Introduction:
Plant growth requires several minerals and nutrients in adequate amounts. It is affected by the inadequate supply of minerals and nutrients. Macronutrients such as nitrogen, carbon, oxygen, and phosphorous plays a major role in plant growth.
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fertilizers are necessary if the soil lacks one of the following nutrients:
a. calcium, carbon, potassium
b. nitrogen phosphorus, potassium
c. nitrogen, phosphorus, magnesium
d. nitrogen, calcium, magnesium
e. phosphorus, potassium, magnesium
Chemical 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.
Which essential chemical must be “fixed” by soil-dwelling bacteria before it can enter the food chain?
a. Carbon
b. Nitrogen
c. Phosphorous
d. Both a. and b.
Chapter 23 Solutions
MasteringBiology With eText - Access
Ch. 23 - Prob. 1QCCh. 23 - Prob. 2QCCh. 23 - What are the components of an ecosystem?Ch. 23 - Prob. 2CRCh. 23 - Describe what happens to a country as it undergoes...Ch. 23 - Define zero population growth and explain why it...Ch. 23 - Prob. 5CRCh. 23 - Prob. 6CRCh. 23 - Prob. 7CRCh. 23 - Explain why the water cycle is essential to all...
Ch. 23 - Discuss the importance of the carbon cycle.Ch. 23 - Discuss the phosphorus cycle and its importance.Ch. 23 -
1. Your college campus, including all the humans...Ch. 23 -
2. Which of the following will affect the biotic...Ch. 23 - A population is growing at a rate of 2% per year....Ch. 23 - Which of the following statements is false? a. The...Ch. 23 - The large intestine of humans is populated by a...Ch. 23 -
5. Which of the following characterizes mature...Ch. 23 - Which statement about the human fertility rate is...Ch. 23 -
6. _____ flow(s) one-way through ecosystems while...Ch. 23 - All of the following terms can appropriately...Ch. 23 -
8. A human maintaining a vegan diet (containing...Ch. 23 - All of the following processes are involved in the...Ch. 23 - Prob. 12TYCh. 23 - Prob. 13TYCh. 23 -
12. Which biogeochemical cycle does not include...Ch. 23 - Prob. 15TYCh. 23 - Given absolutely no environmental resistance, how...Ch. 23 - Prob. 2AWKCh. 23 - Prob. 4AWKCh. 23 - Prob. 5AWKCh. 23 - Prob. 6AWKCh. 23 - Prob. 7AWKCh. 23 - Least developed countries tend to be poorer than...
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- Decomposers are associated with which class of food web? a. grazing b. detrital c. inverted d. aquaticarrow_forwardThe process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called _________. a. dead zoning b. eutrophication c. retrophication d. depletionarrow_forwardWhich nutrient moves into plants during primary production? a.phosphorus b. nitrogen c. carbon d. none e. all threearrow_forward
- The inorganic nutrient most often lacking in crops is(A) carbon.(B) nitrogen.(C) phosphorus.(D) potassiumarrow_forwardFor which of the following problems would growing and maintaining cover crops be an appropriate solution? Erosion is thinning the soil on a farm. The organic matter and nutrients in the soil on a farm are being depleted. The soil on a farm is becoming arid due to decreased water-carrying capacity. a I and II only b I and III only c II and III only d I, II, and IIIarrow_forwardPlant growth is most likely to be limited by the available supply of usable: a. nitrogenb. carbonc. oxygend. phosphorusarrow_forward
- 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? a) To increases usable nitrogen in the soil. b) To increase water retention. c) Nitrogen-fixing plants are not a food crop. d) To decrease bacteria in the soil.arrow_forwardThe 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. Which of the following is not an abiotic factor that affects plants being used in crop rotation? a) NH3 availability b) Soil temperature c) Herbivore density d) Oxygen concentrationarrow_forwardExplain how decomposition contributes to nutrient cycling in the soilsarrow_forward
- Michael wants to build a new storage shed and is considering clearing some trees from his land to use as lumber. What justification best explains the ecological benefit of saving his trees? a Decreasing shade and windbreaks b Providing food for hundreds of species c Sequestering (storing) carbon d Aiding in discharge of aquiferarrow_forwardWhich factors affect soil quality? a. chemical composition b. history of the soil c. presence of living organisms and topography d. all of the abovearrow_forwardWhich of these occurs through symbiotic nitrogen fixation? a. The plant benefits from using an endless source of nitrogen. b. The soil benefits from being naturally fertilized. c. Bacteria benefit from using photosynthates from the plant. d. All of the above occur.arrow_forward
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