Answers SC332 Environmental Science BHuman Use of Land

Human Use of Land Answers

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How might environmental manipulation of a crop have unexpected consequences?

The new crop may require more water than the original.

The crop may harm the environment.

The yield may be reduced.

All of the above

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Which of the following best explains why clear-cutting forests is more destructive than selectively cutting down trees in forests?

Clear-cutting eliminates all trees leaving none behind to maintain soil fertility or house native animals.

Clear-cutting places the land at greater risk for wildfires.

Clear-cutting makes land more attractive for human development.

Clear-cutting causes less soil erosion than selective cutting.

Harvesting timber (wood) from a forest does not harm _______.

soil

wildlife habitat

animals

none of the above

Which describes the difference between national parks and wilderness areas?

There are more national parks in the Unites States than there are wilderness areas.

Wilderness areas do not allow motorized vehicles and national parks do.

National parks prevent pollution while wilderness areas cannot.

National parks allow for land development while wilderness areas do not.

Biological pest control involves _______.

eliminating pests with pesticides

using biological mechanisms to eliminate pests

planting a new crop every year

burning crops

National parks reduce the human impact on land by _______.

permitting limited human development.

cleaning up litter

preventing human development

preventing companies from polluting on public lands

Old growth forests are full of sick, diseased, and decadent trees. Please select the best answer from the choices provided

Which of the following statements about pesticides is true?

Pesticides provide plants with essential nutrients.

Pesticides prevent the destruction of crops.

Pesticides are never harmful to plants.

Pesticides are never harmful to animals.

Reforestation projects would be more beneficial to forests that had undergone selective cutting rather than clear-cutting.

Rangeland is best described as land used for _______.

farming

grazing

agriculture

ranging

Which of the following best explains why clear-cutting forests is more destructive than selectively cutting down trees in forests?

Clear-cutting eliminates all trees leaving none behind to maintain soil fertility or house native animals.

Clear-cutting places the land at greater risk for wildfires.

Clear-cutting makes land more attractive for human development.

Clear-cutting causes less soil erosion than selective cutting.

Environmental manipulation can result in unforeseen consequences.

The populations of the great apes in Africa are recovering and on the rise.

New ecosystems have been created by human land use.

The populations of the great apes in Africa are recovering and on the rise.

How might environmental manipulation of a crop have unexpected consequences?

The new crop may require more water than the original.

The crop may harm the environment.

The yield may be reduced.

All of the above

Which of the following statements about pesticides is true?

Pesticides provide plants with essential nutrients.

Pesticides prevent the destruction of crops.

Pesticides are never harmful to plants.

Pesticides are never harmful to animals.

What was an unexpected consequence of the green revolution?

The overuse of fertilizer lead to reduced crop yields over time.

Crop yields were increased.

Modern agricultural techniques were implemented.

New crop varieties were developed.