Tag: global environmental change

Quizzes (7) Questions (240)

Questions Related to global environmental change

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Which of the following strategy is not a correct approach to reduce global warming?

  1. Reducing the greenhouse gas emission by limiting the use of fossil fuels.
  2. Increase the vegetation cover particularly the forest for photosynthetic utilization of CO$ _2$.
  3. Minimizing the use of nitrogen fertilizers in agriculture for reducing N$ _2$O emission.

  4. Increasing the use of air conditioners, refrigeration unit and production of plastic foams and propellants in aerosol spray cans.

  5. Developing substitutes for chlorofluorocarbons.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • As individuals, we can help by taking action to reduce our personal carbon emissions.
  •  But to fully address the threat of global warming, we must demand action and support and implement a comprehensive set of climate solutions:
  •  Expand the use of renewable energy and transform our energy system to one that is cleaner and less dependent on coal and other fossil fuels.
  •  Increase vehicle fuel efficiency and support other solutions Place limits on the amount of carbon that polluters are allowed to emit. 
  • Build a clean energy economy by investing in efficient energy technologies, industries, and approaches. 
  • Reduce tropical deforestation and its associated global warming emissions.
  • Hence, Increasing the use of air conditioners, refrigeration unit and production of plastic foams and propellants in aerosol spray cans is not a correct approach to reduce global warming. 
  • So, the correct answer is 'Increasing the use of air conditioners, refrigeration unit and production of plastic foams and propellants in aerosol spray cans'.
Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Which of the following is caused by an increase in $\displaystyle { CO } _{ 2 }$ concentration in the atmosphere?

  1. Global warming

  2. Eutrophication of lakes

  3. Depletion of the ozone layer

  4. Magnification in the food chain

  5. Acid rain
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Global warming is caused by increased concentration of greenhouse gases (carbon dioxide is one of the greenhouse gas) in the atmosphere. Increased organic matter in lakes causes eutrophication. Ozone depletion is mainly related to the use of CFC-based products. Acid rain is the result of increased sulphur and nitrogen oxide levels in the atmosphere. Increased use of pesticides causing the death of predators will cause accumulation of nonbiodegradable compounds in the food chain. Thus, the correct answer is option A. 

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Ultra-violet light causes

  1. Formation of pyrimidines dimers

  2. Sticky metaphases

  3. Photodynamic action

  4. Destruction of hydrogen bonds between complementary DNA strands
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Ultra-violet radiations are the potent mutagens as they are capable of distorting the structure of the DNA. The UV radiations cause the adjacent pyrimidines residues (thymine and cytosine) to form hydrogen bonds with each other rather than the corresponding purine residues. Generally, the thymine dimers are seen as immediate effects of the UV radiations. Due to this type of mutation, the errors in replication of DNA are frequent to observe. The breaking of hydrogen bonds between the two complementary DNA strands occurs due to increase in temperature. This is not considered as a mutation because when normal conditions arrive the hydrogen bonds can be formed again.

Hence, the correct answer is 'Formation of pyrimidines dimers'.

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Which is not a proper strategy to reduce global warming?

  1. Developing substitutes of chlorofluorocarbons.

  2. Increasing use of air conditioners, refrigeration units and production of plastic foams and propellants in aerosol spray cans.

  3. Minimising use of nitrogen fertilizers in agriculture for reducing nitrogen oxide emission.
  4. Increase vegetation cover, particularly forest, for photosynthetic utilisation of $CO _2$.

  5. Reducing green house gas emission by limiting use of fossil fuels.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Global warming refers to the overall increase in the tropospheric temperature reflected on the earth's surface. Developing substitutes for chloroform will not allow the build of chloroforms in the atmosphere. Minimal use of nitrogen fertilizers will not allow nitrogen oxides to cause secondary pollutants. Increase in vegetation like forests will make sure that carbon dioxide is used and so it will not cause the greenhouse effect. Limited use of fossil fuels will not add carbon dioxide, methane, oxides of sulphur etc and thus environment can be saved from their deleterious effects. On the other hand increase use of ACs, refrigerators, production of plastic forms and aerosol spray can propellants are harmful to the environment in a great deal because they cause ozone hole as well as global warming.

Hence, the correct answer is 'Increasing use of air conditioners, refrigeration units and the production of plastic foams and propellants in aerosol spray cans.'

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Kyoto protocol is a multination international treaty for

  1. phasing out greenhouse gases

  2. controlling ozone destroying substances

  3. management of hazardous wastes

  4. conservation of biodiversity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Kyoto protocol is an international treaty which extends the 1992 united nations framework convention on climate change (UNFCC) that commits state parties to reduce greenhouse gas emissions, based on the scientific consensus that global warming is occurring.

So, the correct option is Phasing out greenhouse gases.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Read the following statements and select the correct option.


Statement 1: Ozone layer present in the stratosphere protects the living organisms from harmful UV rays coming from the sun by absorbing nearly all of them.

Statement 2: Ozone formed in the troposphere by photochemical reactions as a result of human activities which is harmful to all living organisms.

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

'Good ozone' is found in the upper part of the atmosphere called the stratosphere and it act as a shield by absorbing ultraviolet radiations from the sun. UV rays are, highly injurious to living organisms. 'Bad ozone' is formed in the lower part of atmosphere called troposphere and it harms plants and animals.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

The major ozone depleting substance out of the following is _____________.

  1. $ { CFC }{ s } $
  2. $ { O } _{ 2 } $

  3. Nitrogen

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ozone-depleting substances (ODS) are substances that react with ozone present in the stratosphere and destroy the same. The major Ozone-depleting substances are chlorofluorocarbons (14% of total depletion), nitrogen oxides (3.5% depletion), sulphur dioxide, halon, carbon tetrachloride, methyl chloroform, chlorine, etc.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Increasing skin cancer and high mutation rate are the result of _______________.

  1. Ozone depletion

  2. Acid rain
  3. $CO$ pollution
  4. $ { CO } _{ 2 } $ pollution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ozone depletion occurs widely in the stratosphere due to an increased amount of $ { CFC }{ s } $ which causes various types of skin cancer and mutations.

So, The correct answer is (A)- Ozone depletion.

Multiple choice zoology global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

The maximum hole of ozone is found over ______

  1. Arctic zone

  2. Antarctic zone

  3. Tropical zone

  4. Subtropical zone
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Ozone-depleting substances are present throughout the stratospheric ozone layer because they are transported great distances by atmospheric air motions. The severe depletion of the Antarctic ozone layer known as the “ozone hole” occurs because of the special atmospheric and chemical conditions that exist there and nowhere else on the globe. The very low winter temperatures in the Antarctic stratosphere cause polar stratospheric clouds (PSCs) to form. Special reactions that occur on PSCs, combined with the relative isolation of polar stratospheric air, allow chlorine and bromine reactions to produce the ozone hole in Antarctic springtime. 
So, the correct answer is 'Antarctic zone'.