Tag: biology

Questions Related to biology

Greenhouse effect corresponds to 

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Water pollution

  2. Global warming

  3. $SO _2$ poisoning

  4. Production of green manure

Show answer
Correct Option: B
Explanation:

The greenhouse effect is the phenomenon in which the percentage of poisonous gas like sulphur dioxide, carbon dioxide, carbon monoxide etc. increases which traps the heat in the Earth's atmosphere. The greenhouse gases are NO$ _2$, methane, CO$ _2$, water vapour and ozone. The increase in the heat in the Earth's atmosphere results in the global warming. 

Thus, the correct answer is option B. 

World climate is threatened by increase in the concentration of

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Oxygen

  2. Nitrogen

  3. Water vapours

  4. Carbon dioxide

Show answer
Correct Option: D
Explanation:

Level of carbon dioxide is continuously increasing in the air due to its constant release by burning of fossil fuels in automobiles, industries etc. As a result, the temperature of the earth is on a constant rise. This has led to global warming and the greenhouse effect. The ozone layer is getting depleted causing harmful UV rays to reach the earth and cause serious ill effects. Apart from this, glaciers are constantly melting due to increase in temperature.

So, option D " Carbon dioxide" is the correct answer.

Which of the following is not a green house gas ?

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Methane

  2. Carbon dioxide

  3. Nitrous oxide

  4. Ammonia

Show answer
Correct Option: D
Explanation:

Ammonia is not a green house gas. Methane, carbon dioxide and nitrous oxide are all greenhouse gases. They contribute to the greenhouse effect. Ammonia has no effect on the green house effect. So, option D ammonia s the correct answer.

All of these will directly or indirectly reduce the contribution to greenhouse gases except 

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Encouraging the use of public transportation 

  2. Walking

  3. Biking

  4. Increasing the cost of car ownership and fuel costs

  5. Creating car-free zones

Show answer
Correct Option: C
Explanation:
A. Encouraging the use of public transport will reduce air pollution as this will lead to less use of cars and other personal transport vehicles. If many people instead of travelling by their personal transport vehicle, will use the public transport, then there will be less emission of green house gases.
B. Walking instead of using a vehicle for travelling can also reduce green house gases emission as no transport vehicle will be used and no harmful gases will be released.
C. Biking will contribute to air pollution as green house gases like carbon dioxide are released as the fuel is burnt in the engine of the bike.
D. Increasing the cost of car ownership and fuel costs will tend to decrease in use of less cars as people won't spend much money for this. So, this will also decrease the air pollution and the emission of green house gases.
E. Creating car free zones will make the people to avoid the use of cars and thus, this will also prevent the emission of green house gases.
Hence, all the options except biking, will directly or indirectly reduce the contribution to green house gases.
So, the correct answer is 'Biking'.

Which one of the following pairs in mismatched-

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Nuclear power radioactive wastes

  2. Solar energy green house effect

  3. Fossil fuel burning release of $CO _{2}$

  4. Biomass burning release of $CO _{2}$

Show answer
Correct Option: B
Explanation:
Solar energy decreases greenhouse gas emissions. Generating electricity with solar power instead of fossil fuels can dramatically reduce greenhouse gas emissions, particularly carbon dioxide (C$O _2$). Greenhouse gases, which are produced when fossil fuels are burned, lead to rising global temperatures and climate change.

So, the correct answer is 'Solar energy green house effect'.

The reason for green-house effect is

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Higher $CO _2$ concentration causing global warming

  2. Absorption of infra-red rays by gases and dust particles

  3. Both A and B

  4. Rarefaction of $CO _2$

Show answer
Correct Option: C
Explanation:
A minor but very important component of atmospheric carbon dioxide is released through natural process viz., Respiration, volcanic eruption. Humanly induced activities as deforestation, burning fossils, land use changes are major causes for the release of greenhouse gases in the atmosphere.
The greenhouse gases absorb infrared radiation from the sun and trap some of the radiation. Excess of these gases can force climate change drastically.
Hence, the correct answer is 'Both A and B'.

Green house effect is increasing due to

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Increasing $CO _2$ concentration

  2. Increasing $SO _2$ concentration

  3. Increasing concentration of chlorofluorocarbons

  4. Hole in ozone layer

Show answer
Correct Option: A
Explanation:

The higher concentration of carbon dioxide in the atmosphere is likely to increase the temperature as carbon dioxide permits the short wavelength visible radiations to pass through it but traps the longer wavelength infrared radiation reflected by earth's surface. This is called the greenhouse effect and it results in the overall increase in the global temperature, called global warming. Carbon dioxide contributes to the 81% of the greenhouse gases because it tends to persist in the atmosphere.

Hence, the correct answer is 'Increasing CO$ _{2}$ concentration'

Checking of re-radiation heat by atmospheric dust, $O _3, O _2$ and water vapours is

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Ozone layer effect

  2. Solar effect

  3. Radioactive effect

  4. Green house effect

Show answer
Correct Option: D
Explanation:

The greenhouse effect can be defined as the trapping of radiations of the sun by the tropospheric gases and preventing these radiations from reflecting back to space. The tropospheric gases involved are atmospheric dust, Ozone, Carbon dioxide and water vapour. These gases are responsible for causing global warming.

A. Ozone layer effect occurs in stratosphere only because of ozone.
B. Solar effect is caused due to solar flares.
C. The radioactive effect is due to radioactive elements like uranium and plutonium.
D. The greenhouse effect is due to greenhouse gases.
Hence, the correct answer is 'Greenhouse effect.'

Green house effect is due to the accumulation of

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. $O _3$ and depletion of $CO _2$

  2. $O _3$ and $CO _2$

  3. $CO _2$ and depletion of $O _3$

  4. Green plants

Show answer
Correct Option: B
Explanation:
Carbon dioxide and ozone are called greenhouse gases due to their property of absorbing radiation and emitting heat, but the balanced effect depends upon the lifetime and longevity of these gases, Carbon dioxide has  increased in atmosphere due to increased burning of fossils, cutting of trees, Industrial application, trapping of heat waves can cause excessive heating of earth's temperature.
Ozone is naturally found in the stratosphere where it is constantly broken down by UV rays, but the burning of organic volatile compounds and emission of nitrogen oxides have led to the formation of the ozone layer in the atmosphere resulting in excessive trapping of heat
Hence, the correct answer is 'O$ _{3}$ and CO$ _{2}$'.

Which one of the following is mismatched?

biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

  1. Fossil fuel burning- Release of $CO _2$

  2. Nuclear power- Radioactive wastes

  3. Solar energy- Green house effect

  4. Biomass burning- Release of $CO _2$

Show answer
Correct Option: C
Explanation:

Solar power is the conversion of energy from sunlight into electricity. It is a clean form of energy with zero emission of harmful gases. It decreases dependency on the burning of fossil fuels which emits greenhouse gases which contribute to the warming of the earth's surface in excess. 

A. The burning of fossil fuels is related to the release of carbon dioxide, a major greenhouse gas.
B. Nuclear power plants release radioactive wastes that contaminate the soil and water.
C. Solar energy has no contribution to the greenhouse effect.
D. Biomass burning also results in carbon dioxide emission.
Hence, the correct answer is 'Solar energy- Greenhouse effect'