Tag: biology

Questions Related to biology

The average amount of CO$ _2$ in the atmosphere is

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  1. 100 ppm

  2. 400 ppm

  3. 1000 ppm

  4. 10 ppm

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Correct Option: B
Explanation:
Carbon dioxide is an important gaseous component of the environment. It is fixed by the green plants by the process of photosynthesis. It is released during expiration by the process of respiration. As proclaimed by World Meteorological Organization, the average amount of carbon dioxide which can be passed globally by the atmosphere is 400 ppm. Increase in the carbon dioxide concentration may lead to global warming which is mainly caused due to human activities like deforestation.
So, the correct answer is option B.

Solar radiation heats up

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  1. Land faster than the water bodies

  2. Land slower than the water bodies

  3. Both land and water equally

  4. Neither land nor water

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Correct Option: A
Explanation:

The land has compactly arranged molecules through which conduction takes place and as it is an insulator heat, the heat remains on the surface of the earth i.e. land whereas water has loosely packed molecule heat is transferred by convection and thus it takes a longer time to heat up. Also, water has a higher specific heat capacity, meaning that it requires more energy to heat water to the same temperature as a piece of land. Water also reflects more incoming radiation. The land is dark, rough, and solid, which all contribute to the absorption of the radiation. Unlike water, the land is unable to retain heat for as long as water.

So, the correct answer is 'Land faster than the water bodies'.

Instrument used for measuring wind velocity is

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  1. Anemometer

  2. Hydrometer

  3. Lactometer

  4. Photometer

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Correct Option: A

When the air is saturated, which of the following statements is NOT correct?

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  1. The air temperature equals the wet-bulb temperature

  2. The relative humidity is 100 percent

  3. The air temperature equals the dew point temperature

  4. An increase in temperature will cause condensation to occur

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Correct Option: D

What scale is useful to record the force of wind ?

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  1. Decibel

  2. Richter

  3. Beau fort

  4. Fajita

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Correct Option: C

The wind direction is:

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  1. The direction from which the wind is blowing

  2. The direction to which the wind is blowing

  3. Always directly from high toward low pressure

  4. Always directly from low toward high pressure

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Correct Option: A

The horizontal transport of any atmospheric property by the wind is called:

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  1. Advection

  2. Radiation

  3. Conduction

  4. Latent heat

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Correct Option: A

Heat is absorbed by 'GHGs' in

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  1. Atmosphere

  2. Biosphere

  3. Hydrosphere

  4. Troposphere

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Correct Option: A

What is percentage of trace gases in atmosphere?

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  1. 0.30%

  2. 0.02%

  3. 2.90%

  4. 0.80%

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Correct Option: B

Rate of temperature changes in atmosphere is known as:

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  1. ELR

  2. Lapse rate

  3. Environmental Lapse Rate

  4. RLR

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Correct Option: B