Question

1. The 1930s Dust Bowl in the Great Plains was caused by (1 point)
deforestation.
contour plowing.
using renewable resources.
poor farming practices.
2. When farming, overgrazing, climate change, and/or seasonal drought change farmland into land that cannot support plant life, it is called (1 point)
desertification.
depletion.
deforestation.
monoculture.

Answer 1

1. The 1930s Dust Bowl in the Great Plains was caused by (1 point)
deforestation.
contour plowing.
using renewable resources.
poor farming practices.
2. When farming, overgrazing, climate change, and/or seasonal drought change farmland into land that cannot support plant life, it is called (1 point)
desertification.
depletion.
deforestation.
monoculture.
3. Which statement below is NOT true? (1 point)
Deforestation makes soil vulnerable to drying out.
Deforestation results in loss of roots that stabilize soil.
Deforestation prevents desertification.
Deforestation decreases biodiversity.
4. Of the following, which is the most likely consequence of a manufacturing plant dumping its chemical waste into a nearby stream? (1 point)
increased oxygen levels in the water
decreased flow rate of the stream
loss of a keystone species
an algal bloom
5. Of the following, which is most likely to result after a farmer sprays his crops with pesticides? (1 point)
The crops die.
The insect population increases.
The soil dries up and blows away.
A neighbor’s well tests positive for pesticides.
6. The sulfur and nitrogen compounds in smog combine with water to form (1 point)
ozone.
ammonia.
acid rain.
chlorofluorocarbons.
7. Carbon dioxide is a colorless, odorless gas. Why is it considered a pollutant? (1 point)
It gets into natural waters and kills fish.
It promotes algal growth in natural waters.
It causes respiratory illness in humans.
It increases the warming of the atmosphere.
8. How are species diversity and genetic diversity different? (1 point)
Species diversity is evaluated only in ecosystems, while genetic diversity is evaluated in the entire biosphere.
Species diversity measures the number of species in the biosphere, while genetic diversity measures the variety of genes in the biosphere, including genetic variation within species.
Species diversity measures the number of individuals of a species, while genetic diversity measures the total variety of species.
Conservation biology is concerned with species diversity, but not with genetic diversity.
9. Biodiversity is valuable partly because it (1 point)
gives us interesting things to look at.
tells us about many other species.
contributes to medicine and agriculture.
provides humans with resistance to disease.
10. Which of the following is NOT a threat to biodiversity? (1 point)
pollution
deforestation
crop rotation
climate change

Answer 2

@tqkmb @boxhead06 @mclovin21

Answer 3

What class is this for?