Soil Around the World Answers

National parks reduce the human impact on land by _______.a.permitting limited human development.b.cleaning up litterc.preventing human developmentd.preventing companies from polluting on public lands

New ecosystems have been created by human land use.

Biological pest control involves _______. a. eliminating pests with pesticides b. using biological mechanisms to eliminate pests c. planting a new crop every year d. burning crops Please select the best answer from the choices provided

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

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

What was an unexpected consequence of the green revolution?a.The overuse of fertilizer lead to reduced crop yields over time.b.Crop yields were increased.c.Modern agricultural techniques were implemented.d.New crop varieties were developed.

Insects are responsible for the destruction of a significant percentage of potential food harvests every year.

Which describes the difference between national parks and wilderness areas? a. There are more national parks in the Unites States than there are wilderness areas. b. Wilderness areas do not allow motorized vehicles and national parks do. c. National parks prevent pollution while wilderness areas cannot. d. National parks allow for land development while wilderness areas do not. Please select the best answer from the choices provided

Which of the following best explains why clear-cutting forests is more destructive than selectively cutting down trees in forests? a. Clear-cutting eliminates all trees leaving none behind to maintain soil fertility or house native animals. b. Clear-cutting places the land at greater risk for wildfires. c. Clear-cutting makes land more attractive for human development. d. Clear-cutting causes less soil erosion than selective cutting. Please select the best answer from the choices provided

Harvesting timber (wood) from a forest does not harm _______.a.soilb.wildlife habitatc.animalsd.none of the above