Title: Unit 8 Quiz - Jose
Course: BIS 105 Environmental Biology > Section: BIS 105 Environmental Biology

Q: More than 70% of all corn, cotton, and soybeans grown in the U.S. are genetically modified.
- True
- False
A: True

Q: Describe two agricultural practices, other than those involving pest control, that increase crop yields.

Q: Discuss the pros and cons of biological pest control as an alternative to chemical pesticides.

Q: Concentrated animal feeding operations (CAFOs) can contribute to:
- air pollution because livestock release methane, a greenhouse gas.
- water contamination due to the large amount of waste produced.
- increased incidence of overgrazing rangelands.
- both a and b
- all of the above
A: both a and b

Q: Organic and inorganic materials, water, air, and living organisms together make up [_____].
A: soil

Q: Degradation of land which results in a loss of 10% or more in productivity, especially in semiarid areas, primarily because of human actions like excessive crop planting, animal grazing, and tree cutting.
- desertification
- genetic resistance
- eutrophication
- salinization
- agroforestry
A: desertification

Q: Crops that have DNA from unrelated species are referred to as _________ and the process that is used to produce such crops is called _________.
- hybrids; sustainable agriculture
- GMOs; genetic engineering
- monocultures; CAFOs
- exotic species; biotechnology
- mutualists; green revolution
A: GMOs; genetic engineering

Q: Terracing, contour farming, intercropping, and crop rotation all ________.
- are aspects of IPM
- contribute to erosion and desertification
- are techniques for conserving soil resources and fertility
- contribute to nutrient leaching
- are prohibited in organic farming
A: are techniques for conserving soil resources and fertility

Q: Over the past three decades, global food security has ________.
- declined
- increased
- stabilized
- declined and then recently increased
- declined in developed countries, but increased in developing countries
A: increased

Q: What is the advantage of genetically modified crops?
- they can be designed to resist drought
- they offer improved resistance to pests and diseases
- they can be engineered to improve yield
- they can be altered to produce vaccines
- All of these are benefits to GMOs.
A: All of these are benefits to GMOs.

Q: The ideal pesticide would:
- remain on food to continue to kill pests.
- allow the development of genetic resistance in the pest.
- kill only the target pest.
- be persistent in the environment and make its way into the water supply.
- need to be frequently applied to crops.
A: kill only the target pest.

Q: The dramatic increase in agricultural production during the last century in developed countries was primarily due to an increase in the:
- yield per acre.
- number of farm workers.
- amount of land cultivated.
- government subsidies to agriculture.
- number of farms.
A: yield per acre.

Q: Which of the following best describes integrated pest management (IPM)?
- biocontrol measures, crop rotation, habitat diversification
- transgenic crops
- continuous monoculture cropping and harvesting
- major reliance on synthetic pesticides
- subsidies for pesticide use
A: biocontrol measures, crop rotation, habitat diversification

Q: Monoculture ________.
- describes food that has not been genetically modified
- describes diets low in protein, such as vegetarianism
- farming is a food-growing practice that uses no synthetic fertilizers or pesticides
- describes the farming practice of growing large stands of a single species
- farming is illegal in most countries
A: describes the farming practice of growing large stands of a single species

Q: The consequences of overfertilizing include ________.
- greater crop yields per acre
- eutrophication and dead zones in nearby aquatic ecosystems
- crops spreading into adjacent unfarmed areas
- very fertile soils in future years
- development of antibiotic resistance in pests
A: eutrophication and dead zones in nearby aquatic ecosystems

Q: Overirrigation can result in ________.
- fertility increases
- higher numbers of agricultural pests
- crop rotation
- soil salinization
- higher crop yields
A: soil salinization

Q: The parent material layer of a soil is composed of weathered
- humus
- organic detritus and roots.
- residual aluminum and iron.
- soil
- rock fragments.
A: rock fragments.

Q: The layer of soil that is a mixture of minerals and organic material is the _____.
- A horizon
- O horizon
- B horizon
- C horizon
- humus
A: A horizon