Question 1

Why is "planned grazing" considered an approach based on biomimicry?

Accepted Answer

Native, large herbivores tend to occur i

Question 2

Under ideal conditions it takes about _____________ to make 1 millimeter of soil.

Accepted Answer

A)  5 years 
B)  10 years 
C)  5 months 
D)  1 year 
E)  20 days 
A)  5 years 
B)  10 years 
C)  5 months 
D)  1 year 
E)  20 days

Question 3

Which of the following layers of soil gets depleted during soil erosion?

Accepted Answer

A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  R horizon 
E)  none of these answers 
A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  R horizon 
E)  none of these answers

Question 4

Decomposers and detritivores break down organic material to help form topsoil. Which layer of soil contains the decomposers and detritivores that aid this process?

Accepted Answer

A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  R horizon 
E)  O horizon 
A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  R horizon 
E)  O horizon

Question 5

Which two processes are essential to soil formation?

Accepted Answer

A)  soil erosion and overgrazing 
B)  decay of organic material and soil erosion 
C)  decay of organic material and weathering of parent material 
D)  weathering of parent material and overgrazing 
E)  desertification and weathering of parent material 
A)  soil erosion and overgrazing 
B)  decay of organic material and soil erosion 
C)  decay of organic material and weathering of parent material 
D)  weathering of parent material and overgrazing 
E)  desertification and weathering of parent material

Question 6

What is an outcome of planned grazing?

Accepted Answer

A)  Keeping animals bunched for a set period of time ensures that all plants are grazed evenly, even weeds. 
B)  It maximizes productivity. 
C)  It helps keep plant biomass levels in an ideal range, which maximizes productivity. 
D)  It makes ranching profitable again. 
E)  All of these answers are correct. 
A)  Keeping animals bunched for a set period of time ensures that all plants are grazed evenly, even weeds. 
B)  It maximizes productivity. 
C)  It helps keep plant biomass levels in an ideal range, which maximizes productivity. 
D)  It makes ranching profitable again. 
E)  All of these answers are correct.

Question 7

The majority of domesticated animals being grazed on grasslands are___________.

Accepted Answer

A)  cattle 
B)  chickens 
C)  pigs 
D)  turkeys 
E)  horses 
A)  cattle 
B)  chickens 
C)  pigs 
D)  turkeys 
E)  horses

Question 8

One of the advantages of using land for grazing is __________________.

Accepted Answer

A)  it takes less land per animal than feeding grain to livestock 
B)  we are turning material we cannot eat into food that we can eat 
C)  that plants are eaten faster than they can grow 
D)  that the soil becomes compacted, making it harder for seeds to germinate 
E)  All of these answers are advantages for using land for grazing. 
A)  it takes less land per animal than feeding grain to livestock 
B)  we are turning material we cannot eat into food that we can eat 
C)  that plants are eaten faster than they can grow 
D)  that the soil becomes compacted, making it harder for seeds to germinate 
E)  All of these answers are advantages for using land for grazing.

Question 9

What is the greatest threat facing grasslands today?

Accepted Answer

A)  global climate change 
B)  human-land use decisions 
C)  overgrazing 
D)  urbanization 
E)  pollution 
A)  global climate change 
B)  human-land use decisions 
C)  overgrazing 
D)  urbanization 
E)  pollution

Question 10

Which of the following is a consequence of overgrazing in grasslands?

Accepted Answer

A)  compaction of soil 
B)  reduction in water penetration 
C)  reduction in seed germination 
D)  reduced seedling growth 
E)  all of these answers 
A)  compaction of soil 
B)  reduction in water penetration 
C)  reduction in seed germination 
D)  reduced seedling growth 
E)  all of these answers

Question 11

Which of the following statements are correct?

Accepted Answer

A)  Grasslands are not found in Antarctica. 
B)  Grasslands are found in every continent. 
C)  Grasslands vary based on climate. 
D)  Both A and C are correct. 
E)  Both B and C are correct. 
A)  Grasslands are not found in Antarctica. 
B)  Grasslands are found in every continent. 
C)  Grasslands vary based on climate. 
D)  Both A and C are correct. 
E)  Both B and C are correct.

Question 12

The Flint Hills region of the Great Plains is dominated by tallgrass prairie. Large tracts of the prairie remain because the soil was too thin and rocky to be especially good for crop production. In the past two decades, areas of tallgrass prairie have been protected in reserves because of the loss of this grassland system over time-in large part a result of domestic animal production and some crop agriculture. At the eastern border of the region, deciduous forests have been gradually moving west, replacing tallgrass prairie. What do you think is leading to this pattern of change?

Accepted Answer

In areas of sufficient rainfall to suppo

Question 13

Which of the following crops was not originally derived from grasslands?

Accepted Answer

A)  wheat 
B)  rye 
C)  barley 
D)  rice 
E)  millet 
A)  wheat 
B)  rye 
C)  barley 
D)  rice 
E)  millet

Question 14

The long root systems of native prairie grasses allow them to access greater supplies of water and generally pass through which three soil horizons?

Accepted Answer

A)  R, C, and B 
B)  O, A, and C 
C)  O, A, and B 
D)  A, B, and C 
E)  none of these answers 
A)  R, C, and B 
B)  O, A, and C 
C)  O, A, and B 
D)  A, B, and C 
E)  none of these answers

Question 15

What are the advantages of shelterbelts?

Accepted Answer

A)  They increase wildlife habitat. 
B)  They protect the crops and grasses from wind damage. 
C)  They reduce soil erosion and water pollution. 
D)  They allow recreational use while protecting habitats. 
E)  They reduce taxes to the landowner if their land stays protected. 
A)  They increase wildlife habitat. 
B)  They protect the crops and grasses from wind damage. 
C)  They reduce soil erosion and water pollution. 
D)  They allow recreational use while protecting habitats. 
E)  They reduce taxes to the landowner if their land stays protected.

Question 16

Which type of grasslands are also known as a savannas?

Accepted Answer

A)  rangeland 
B)  tropical 
C)  cold 
D)  temperate 
E)  none of these answers 
A)  rangeland 
B)  tropical 
C)  cold 
D)  temperate 
E)  none of these answers

Question 17

Which of the following does NOT explain how grazing can be beneficial to a grassland?

Accepted Answer

A)  Clipping off the top part allows the sun to get to the new shoots. 
B)  Hooves can break up soil, allowing water to penetrate. 
C)  Breaking up soil with hooves allows new seeds to germinate. 
D)  Defecation and urination from grazers adds phosphorus and nitrogen to the soil. 
E)  Chewing a grass down to its roots helps it rejuvenate. 
A)  Clipping off the top part allows the sun to get to the new shoots. 
B)  Hooves can break up soil, allowing water to penetrate. 
C)  Breaking up soil with hooves allows new seeds to germinate. 
D)  Defecation and urination from grazers adds phosphorus and nitrogen to the soil. 
E)  Chewing a grass down to its roots helps it rejuvenate.

Question 18

Soil erosion in grasslands is a direct result of _____________.

Accepted Answer

A)  urbanization and soil compaction 
B)  soil compaction and energy production 
C)  plant loss and urbanization 
D)  plant loss and soil compaction 
E)  plant loss and energy production 
A)  urbanization and soil compaction 
B)  soil compaction and energy production 
C)  plant loss and urbanization 
D)  plant loss and soil compaction 
E)  plant loss and energy production

Question 19

Humans rely upon grasslands to graze domestic livestock. How would degradation of grasslands impact grazing, and what affect would this have on humans?

Accepted Answer

Globally, three billion domestic livesto

Question 20

The animal farming technique known as __________________ allows animals to graze on one small section of a pasture for a few days before being moved to another section for grazing.

Accepted Answer

A)  rotational grazing 
B)  terracing 
C)  planned grazing 
D)  numerical limits grazing 
E)  none of these answers 
A)  rotational grazing 
B)  terracing 
C)  planned grazing 
D)  numerical limits grazing 
E)  none of these answers

Exam 27: Learned After the Fact

Why is "planned grazing" considered an approach based on biomimicry?

Under ideal conditions it takes about _____________ to make 1 millimeter of soil.

Which of the following layers of soil gets depleted during soil erosion?

Decomposers and detritivores break down organic material to help form topsoil. Which layer of soil contains the decomposers and detritivores that aid this process?

Which two processes are essential to soil formation?

What is an outcome of planned grazing?

The majority of domesticated animals being grazed on grasslands are___________.

One of the advantages of using land for grazing is __________________.

What is the greatest threat facing grasslands today?

Which of the following is a consequence of overgrazing in grasslands?

Which of the following statements are correct?

Which of the following crops was not originally derived from grasslands?

The long root systems of native prairie grasses allow them to access greater supplies of water and generally pass through which three soil horizons?

What are the advantages of shelterbelts?

Which type of grasslands are also known as a savannas?

Which of the following does NOT explain how grazing can be beneficial to a grassland?

Soil erosion in grasslands is a direct result of _____________.

Humans rely upon grasslands to graze domestic livestock. How would degradation of grasslands impact grazing, and what affect would this have on humans?

The animal farming technique known as __________________ allows animals to graze on one small section of a pasture for a few days before being moved to another section for grazing.

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