Environment & Biodiversity MCQs
Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.
41. Which of the following is not a natural hazard?
[A] Volcanoes
[B] Climate Change
[C] Earthquake
[D] Tsunami
Show Answer
Correct Answer: B [Climate Change]
Notes:
Climate change can be defined as the ongoing rise in the average temperature of the Earth’s climate system. From all the given options only climate change is not a natural hazard but is induced by human activities.
42. The Downhill movement of earth upper soil layer is mainly caused due to which of the following reason?
[A] Pollution
[B] Rain
[C] Drought
[D] None of the above
Show Answer
Correct Answer: B [Rain]
Notes:
A landslide is the movement of rock, earth, or debris down a sloped section of land. It is mainly caused due to a variety of factors. some of the man-made factors are- Deforestation, removal of the upper layer of soil, etc and the natural causes are rain, earthquake, etc.
43. The Screening Criteria under Environment Impact Assessment are based upon which of the following?
1. Scales of investment
2. Type of development
3. Location of development
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: D [1, 2 & 3]
Notes:
The Screening Criteria under Environment Impact Assessment are based upon the following:
1. Scales of investment
2. Type of development
3. Location of development
44. Which of the following statements are correct regarding Nanotoxicology?
1) It is the study of the toxicity of nanomaterials.
2) Inhalation exposure is of most concern.
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Nanotoxicology is defined as the study of the toxicity of nanomaterials. nanomaterials have unique properties as compared to their larger counterparts because of the large surface area to volume ratio of nanomaterials. Inhalation exposure is of most concern because of its quantum size.
45. At which place Lingambudhi lake is situated?
[A] Bangaluru
[B] Hubbali
[C] Mysuru
[D] Shivamogga
Show Answer
Correct Answer: C [Mysuru]
Notes:
Lingambudhi Lake is a lake in the city of Mysore, Karnataka.
46. Why do Mangrove trees have breathing roots?
[A] The roots prevent soil erosion
[B] To store oxygen up to 4 days
[C] The roots are the only place where photosynthesis is done
[D] To obtain oxygen from the air
Show Answer
Correct Answer: D [To obtain oxygen from the air]
Notes:
The trees of mangrove forest having
breathing roots, which are usually very large to stand in deep mud. The necessity of Mangrove having breathing roots is to obtain oxygen from the atmosphere, while the soil in which mangroves grow are poor in oxygen.
47. Which of the following is a biodegradable waste?
[A] Plastics
[B] Wool
[C] Nylon
[D] Polythene bags
Show Answer
Correct Answer: B [Wool]
Notes:
Biodegradable waste is a type of waste which can be broken down, in a reasonable amount of time, into its base compounds by micro-organisms and other living things, regardless of what those compounds may be. Wool is the textile fibre obtained from sheep and certain other animal products are organic in nature and thus can be degraded and be used as substrates for keratinase production.
48. Which of the following is the treatment of water pollution?
[A] Bag house filter
[B] Reverse Osmosis
[C] Windrow composting
[D] Venturi scrubber
Show Answer
Correct Answer: B [Reverse Osmosis]
Notes:
Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water. It can remove many types of dissolved and suspended species from water, including bacteria, and is used in both industrial processes and the production of potable water (Desalination of marine water). It is most commonly known for its use in drinking water purification plants particularly in countries of middle east.
49. Why Taj Mahal is suffering from “Marble Cancer”?
[A] Because of sulphur dioxide
[B] Because of nitrogen dioxide
[C] Because of chloroflurocarbon
[D] Because of carbon dioxide
Show Answer
Correct Answer: A [Because of sulphur dioxide]
Notes:
The Taj Mahal, is slowly turning brownish-yellow because of air pollution, also called “Marble cancer”. The Industries located in and around Agra especially the Mathura oil refinery have been responsible for producing pollutants. Emissions of sulphur dioxide around the Taj Mahal are twice the permissible levels. Now, researchers found 3% of the deposits to be black carbon, around 30% organic carbon (or brown carbon) and most of the rest dust. Black carbon is emitted by vehicles and other machines that burn fossil fuels.
50. Which among the following can be termed as a “dynamic living entity”?
[A] Tree
[B] Water
[C] Forest
[D] Air
Show Answer
Correct Answer: C [Forest]
Notes:
Forests are home to a large number of plants and animals. They are the “green lungs” and serve as water purifying systems of nature. In a forest, there are various types of interactions that occur between the living and the non-living components. The oxygen released during photosynthesis is used by the animals for respiration. In this way, plants and animals help in maintaining the balance of oxygen and carbon dioxide in the atmosphere. Therefore, forests can be considered as a dynamic living entity.