Tag: biology

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Questions Related to biology

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Which of the following bind the soil together?

  1. Trees

  2. Pond

  3. River

  4. Layers of the soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Roots of trees hold the soil particles and prevent their loss. When trees are cut on a large scale land becomes barren. This results in the loss of upper soil layer due to heavy wind or flowing water leading to soil erosion. Hence afforestation prevents soil erosion. Thus the correct answer is option A.  

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

How does seeding of areas help in reducing soil erosion?

  1. By allowing flow of water

  2. By collecting runoff water

  3. By avoiding water

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Seeding areas increases vegetation, which helps in slowing down water flow and collecting runoff, thereby reducing the amount of soil carried away by water.

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

What prevents soil erosion?

  1. Allowing herbivorous animals to graze excessively

  2. Growing plants to form the soil cover

  3. Increasing fertility

  4. Making the land sloppy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Soil erosion is the loss of the fertile soil due to an absence of plants which can hold the soil. 
  • The roots of the plants allow the soil to be held due to the presence of water. In deforestation, there is the cutting or the removal of plants. 
  • Due to which the water present in the soil gets evaporated resulting in a barren land. 
  • This barren land is prone to soil erosion which results in the loss of the upper layer of the soil.

Thus, the correct answer is option B. 

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Soil erosion can be reduced by

  1. Grazing cattle

  2. Deforestation

  3. Using renewable resources

  4. Contour ploughing

  5. Increasing biodiversity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Grazing cattle can promote soil erosion because as the cattle eat the vegetation, the soil particles loosen and can be easily carried away by wind, water etc.
B. Deforestation leads to soil erosion because roots of the plants held the soil particles tightly and if there will be no trees, the soil particles will be loosened and can be easily carried away by wind or water.
C. Using renewable resources has no effect on soil erosion as renewable sources are the sources that can be replenished naturally over a period of time.
D. Contour ploughing is the ploughing of land according to its contour or slope to prevent soil erosion.
E. Increasing biodiversity will promote soil erosion as more organisms will be there which will feed on vegetation and this will cause the same effect as that of grazing cattle.
Hence, soil erosion can be reduced by Contour Ploughing.
So, the correct answer is 'Contour ploughing'.
Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Removal of soil by the action of wind and water is known as

  1. Soil erosion

  2. Soil conservation

  3. Salination

  4. Calcification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(a) Top soil is the vital part of the soil and serves as the chief source of nutrition for plants. Loss or disturbance of top soil by natural agents like water, wind, gravity or ice is called soil erosion.