Nutrition
15th Edition
ISBN: 9781337906371
Author: Sizer, Frances Sienkiewicz., WHITNEY, Ellie
Publisher: Cengage Learning,
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Textbook Question
Chapter 15, Problem 12SC
Which of the following is a threat to the future food supply?
- fossil fuel use
- water shortages
- ocean pollution
- all of the above
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- Greenhouse gases ________. a. slow the escape of heat from Earth into space b. are produced by natural and human activities c. are at higher levels than they were 100 years ago d. all of the abovearrow_forwardThe study of nutrient cycling though the environment is an example of which of the following? organismal ecology population ecology community ecology ecosystem ecologyarrow_forwardThe loss of an apex consumer would impact which trophic level of a food web? primary producers primary consumers secondary consumers all of the abovearrow_forward
- Figure 46.17 Which of the following statements about the nitrogen cycle is false? Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+). Denitrification by bacteria converts nitrates (NO3-) to nitrogen gas (N2). Nitrification by bacteria converts nitrates (NO3 ) to nitrites (NO2-). Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardFigure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardCompared to the less developed countries, the highly developed ones have a higher ________. a. death rate c. total fertility rate b. birth rate d. resource consumption ratearrow_forward
- An organism exists for long periods by using only CO2 and H2O. herbivore. carnivore. decomposer. autotroph. heterotroph.arrow_forwardWhy are drinking water supplies still a major concern for many countries?arrow_forwardThe maximum growth rate characteristic of a species is called its _________. a. limit b. carrying capacity c. biotic potential d. exponential growth patternarrow_forward
- Which of the following is not a way that humans have increased the carrying capacity of the environment? a. agriculture b. using large amounts of natural resources c. domestication of animals d. use of languagearrow_forwardThe use of off-road recreational vehicles may double in the next 20 years. Enthusiasts would like increased access to government-owned deserts like the one shown in Figure 24.1 A. Some argue that deserts are the perfect places for off-roaders because theres nothing there. Explain whether you agree, and why.arrow_forwardFigure 45.10b If the major food source of the seals declines due to pollution or overfishing, which of the following would likely occur? The carrying capacity of seals would decrease, as would the seal population. The carrying capacity of seals would decrease, but the seal population would remain the same. The number of seal deaths would increase but the number of births would also increase, so the population size would remain the same. The carrying capacity of seals would remain the same, but the population of seals would decrease.arrow_forward
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