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Differentiate between malnutrition,undernutrition,and overnutrition.Provide an example of poor health that can result from each of these conditions.

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-Malnutrition results from either an underconsumption of calories or specific nutrients or to an overconsumption of calories.Undernutrition and overnutrition are both examples of malnutrition. -Undernutrition is a type of malnutrition in which there is an underconsumption of calories or nutrients of calories that leaves the body weakened and susceptible to disease.Examples of undernutrition are Kwashiorkor or Marasmus. -Overnutrition is a type of malnutrition from a diet high in saturated (animal)fats,sugar and salt.Overnutrition leaves the body susceptible to disease and increases the likelihood of diabetes,heart disease,and some cancers.

The recent trend of U.S.prime farmland has been


A) a loss of 162,000 hectares per year.
B) a loss of 400,000 hectares per year.
C) a gain of 162,000 hectares per year.
D) a gain of 400,000 hectares per year.
E) a consistent acreage of productive agricultural land.

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An individual who is overnourished


A) has a diet high in cereal grains and low in livestock products.
B) probably lives in a rural area of a developing country
C) will have pronounced muscle tone and accelerated skeletal growth.
D) has a protein deficiency even though adequate calories are consumed.
E) has an increased likelihood of obesity,diabetes,and heart disease.

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The move away from using techniques that produce high yield and toward methods that focus on long-term sustainability of the soil is known as


A) habitat fragmentation.
B) subsistence agriculture.
C) industrialized agriculture.
D) the green revolution.
E) the second green revolution.

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Industrialized agriculture's increased use of pesticides over the past years is resulting in


A) fewer insects and weeds developing resistance to pesticides.
B) more insects and weeds developing resistance to pesticides.
C) more beneficial microorganisms in the soil
D) more biodiversity of fish and other aquatic organisms not affected by the pesticides.
E) farmers applying progressively smaller quantities of pesticides.

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The white leghorn hen is prolific at egg laying,but not good for meat production and now produces almost all of the eggs in the U.S.This points to a global trend where


A) genetic variety is being expanded through genetic engineering.
B) a single variety of farm animal cannot face extinction through a disease outbreak.
C) animals bred for maximum production are not performing as anticipated.
D) farmers are being subsidized not to keep white leghorn hens.
E) the eggs and sperm of domesticated animal varieties are being banked for preservation.

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Pesticides are effective in


A) decreasing the cost of subsistence farming.
B) increasing the crop damage due to competition with weeds.
C) small concentrations but not in large concentrations.
D) controlling some organisms that cause diseases in humans.
E) attracting particular insects to an area.

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Define sustainable agriculture and list three changes that would need to be incorporated into industrialized agriculture to make it more sustainable.

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Sustainable agricultural methods maintai...

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Discuss three similarities between the evolution of microorganisms' resistance to antibiotics and pest species evolving genetic resistance to pesticides.

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Similarities:
-The use of antibiotics ha...

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Which of the following types of agriculture is correctly matched with the agricultural practice


A) industrialized : polyculture
B) industrialized : shifting cultivation
C) subsistence : slash-and-burn
D) subsistence : microfarming
E) industrialized : intercropping

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All of the following are similarities between undernutrition and overnutrition except


A) both are a type of malnutrition.
B) both involve lack of access to sufficient daily calories.
C) both leave the body susceptible to disease.
D) both can affect young or old individuals.
E) both are ailments that can be found in developing countries.

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B

What would a narrow-spectrum pesticide kill


A) its target organism
B) indiscriminate organisms in the vicinity of its spray
C) thin-leaved plants
D) tapered insects such as wasps and ants
E) all organisms in a restricted range

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Which type of pesticide has fewer deleterious environmental effects Why


A) narrow-spectrum pesticide because it focuses on killing specific organisms
B) narrow-spectrum pesticide because it stays exactly where it is sprayed
C) broad-spectrum pesticide because it moves around the environment to reach all potential pests
D) broad-spectrum pesticide because insects cannot develop resistance to it
E) neither broad and narrow-spectrum pesticides have deleterious environmental effects

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All of the following are negative environmental impacts of the use of pesticides in industrialized agriculture except


A) production of greenhouse gases from pesticide exposed plants.
B) air pollution from pesticide sprays.
C) soil pollution from pesticide residues.
D) contamination of food supply from pesticide residues.
E) reduction of the number and diversity of beneficial microorganisms in the soil.

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Which two crops have been significantly improved by the green revolution


A) beets and maize
B) sweet potatoes and taro
C) wheat and rice
D) corn and white potatoes
E) barley and bulgur

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The natural or human-induced reduction in the potential ability of the land to support crops or livestock is


A) sustainable agriculture.
B) the green revolution.
C) a result of intercropping.
D) harvest deprivation.
E) land degradation.

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Which of the following statements about pesticides is false


A) The prolonged use of a particular pesticide can cause a pest population to develop genetic resistance to it.
B) Most pesticides affect more species than the pests for which they are intended.
C) Pesticides applied to agricultural lands tend to stay where they are applied.
D) Most pesticides are chemically stable and do not degrade readily in the environment.
E) Pesticides reduce the amount of crop loss through consumption by insects.

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C

What is a biological control for pest management


A) some members of the pest population are sterilized
B) sexual attractants lure pest species to traps
C) predators,parasites,or disease organisms are released to reduce pest populations
D) harvested foods are exposed to ionizing radiation
E) genetic engineering develops pest-resistant crops

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Subsistence agricultural practices are characterized by all of the following attributes except


A) use of manure as fertilizer.
B) use of draft animals for labor source.
C) water and fossil fuel energy conservation.
D) high crop yield per acre.
E) limited use of agrochemicals.

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What is a broad-spectrum pesticide


A) a liquid pesticide that can cover expansive areas of agricultural lands with no negative impact
B) a combination of pesticide and fertilizer that allow plants to grow faster while killing its pests
C) a specific pesticide that kills the intended organism and does not harm any others
D) a wide-reaching pesticide that kills a variety of organisms,including beneficial ones
E) a pesticide that stays exactly where it is sprayed and degrades over time

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