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VisionIAS - Online Self Test
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Questions for practice
1)

Which of the following environmental impacts were caused due to the rise of Nitrogen content in the Environment?

  1. Acidification
  2. Ozone hole formation
  3. Smog
  4. Eutrophication

Select the correct answer from the codes given below:

(a) 1 and 3 Only

(b) 1, 2, and 3 Only

(c)1, 3, and 4 Only

(d)1, 2 ,3, and 4

2)

Which of the following is/are the correct reasons for Causing Hypoxia?

1. It is created due to a lack of the mixing of water.

2. Man Made or Anthropogenic dead zones are created due to phenomena like Eutrophication.

Select the correct answer using the codes given below.

(a)Option 1

(b)Option 2

(c)Both the options are correct

(d)None of the above

3)

In the context of the Phosphorus Cycle consider the following: 

  1. The phosphorus Cycle is a rapid cycle, which completes in a few seasons.
  2. An average phosphate ion cannot remain in a system for more than a few months. 

Select the correct answer using the code below: 

(a)1 only

(b)2 only

(c)Both 1 and 2

(d)None are true.

4)

Consider the following statement with regard to Eutrophication:

1. It is characterized by excessive plant and algal growth.
2. Human activities have accelerated the rate and extent of eutrophication through water pollution.
3. The situation sees a change in the balance between the number of algae and phytoplankton versus the atmospheric oxygen versus dead organic matter present in the water body.

How many of the above statements are correct?

(a)Only one

(b)Only two

(c)All the three

(d)None of the above

5)

Consider the following(Prelims 2011 & 2014)
1. Photosynthesis
2. Respiration
3. Decay of organic matter
4. Volcanic action
Which of the above add carbon dioxide to the carbon cycle on Earth ?

(a)1 and 4 only

(b)2 and 3 only

(c)2,3 and 4

(d)1,2 3 and 4

6)

In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of the release of nutrients to enter the cycle? (Prelims 2021)

(a)Carbon Cycle

(b)Nitrogen Cycle

(c)Phosphorus Cycle

(d)Sulfur Cycle

7)

Consider the following statements :
Statement-1 : Saprotrophs are mostly bacteria and fungi that decompose dead organic matter of plants and animals.
Statement-2 : They cannot recycle nutrients. 
Which one of the following is correct in respect of the above statements?

(a) Both Statement-1 and Statement-2 are correct and Statement-2 is the correct explanation for Statement-1

(b)Both Statement-1 and Statement-2 are correct and Statement-2 is not the correct explanation for Statement-1

(c) Statement-1 is correct but Statement-2 is incorrect

(d)Statement-1 is incorrect but Statement-2 is correct 

8)

Consider the following statements regarding Gross Primary Productivity (GPP):

  1. GPP represents the total energy captured by plants in an ecosystem through photosynthesis.
  2. GPP is typically measured in units of square meter per year (m²/year).
  3. GPP subtracts the energy used by plants for respiration.
  4. GPP is a useful metric for assessing the total energy available for herbivores in an ecosystem.

How many of the statement(s) given above are correct ?

(a)One Only

(b)Two Only

(c)Three Only

(d)Four Only

9)

What do you understand by Bioaccumulation and Biomagnification, and how do these processes impact ecosystems and food chains? (150 Words/10 Marks)

10)

Each year large amount of plant material cellulose is deposited on the surface of planet Earth, what are the natural processes this cellulose undergoes yeilding carbon dioxide, water, and other end products (150 Words/10 Marks)(GS-3 UPSC 2022)



Answers
1) d
2) c
3) d
4) b
5) c
6) c
7) c
8) b