Tag: abiotic components

Questions Related to abiotic components

Which one of the following components of ecosystem comes from outside?

biology living in harmony climate factors abiotic components organisms and environment

  1. Oxygen

  2. Temperature

  3. Insects

  4. Energy

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Correct Option: D
Explanation:

In an ecosystem, the ultimate source of energy is the sun. The solar energy is trapped by producers and converted to usable biochemical compounds like carbohydrates. These carbohydrates are passed on successively to higher trophic levels. Thus, the correct answer is option D.

Source of energy in ecosystem is

biology living in harmony climate factors abiotic components organisms and environment

  1. Sun

  2. Sugar produced in photosynthesis

  3. Green plants

  4. ATP

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Correct Option: A
Explanation:

An ecosystem consists of living things like producers, consumers and decomposers and nonliving things like air, water, land. The ultimate source of energy in an ecosystem is sun. The plants in presence of sunlight synthesize its food. From plants, the energy is transferred to primary consumers and secondary consumers and decomposers. 

The correct answer is 'Sun.'

Pick the odd one out
Natural gas, Sun, Bio-mass, Wind.

biology living in harmony climate factors abiotic components organisms and environment

  1. Natural gas

  2. Sun

  3. Bio mass

  4. Wind

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Correct Option: A
Explanation:

Natural gas is a non-renewable source of energy that is made of hydrocarbons, primarily methane. Its usage is subjected to the exhaustion because its formation takes time. Sun, biomass wind are the renewable sources of the energy. Their usage does not result in their exhaustion.

Hence, the correct answer is 'Natural gas'

Which of the following is most ecologically relevant factor ?

biology living in harmony climate factors abiotic components organisms and environment

  1. Precipitation

  2. Temperature

  3. Soil

  4. Wind

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Correct Option: A
Explanation:
Precipitation is any form of a liquid or solid water particles that falls from the atmosphere and reach the surface of the earth. Its effect deflect the temperature, wind and humidity. 
So the correct answer is 'Precipitation'.

Read the following statements and choose the correct set of option w.r.t. ecosystem.
I. Various ecosystem are interconnected by flow of energy and transfer of materials.
II. It is self sustained and self regulated segment of nature.
III. Energy flow is always cyclic while flow of nutrients is unidirectional.
IV. Density of ecosystem is governed by degree of biogeochemical cycling and the amount of nutrients.

biology living in harmony climate factors abiotic components organisms and environment

  1. I, II and IV are correct

  2. I, II and III are correct

  3. Only III is are correct

  4. III and IV are correct

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Correct Option: A

Identify which is not correct?

biology living in harmony climate factors abiotic components organisms and environment

  1. Age of Universe -$20$ Billion years

  2. Age of Earth - $4.5$ Billion years

  3. Life appeared on earth - $500$ million years

  4. Both a & b

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Correct Option: A

The earth is tilted at an angle of $23.5^{o}$  with respect to the plane of its orbit around the sun. If the amount of tilt were increased to $40^{o}$, we would expect in middle latitudes:

biology living in harmony climate factors abiotic components organisms and environment

  1. Hotter summers and colder winters than at present

  2. Cooler summers and milder winters than at present

  3. Hotter summers and milder winters than at present

  4. Cooler summers and colder winters than at present

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Correct Option: A

In the stratosphere, the air temperature normally:

biology living in harmony climate factors abiotic components organisms and environment

  1. Decreases with increasing height

  2. Increases with increasing height

  3. Both increases and decreases depending on the season

  4. Cannot be measured

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Correct Option: B

Sunlight that bounces off a surface is said to be __________ from the surface.

biology living in harmony climate factors abiotic components organisms and environment

  1. Radiated

  2. Absorbed

  3. Emitted

  4. Reflected

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Correct Option: D

One third of sunlight striking earth and its atmosphere is reflected back to

biology living in harmony climate factors abiotic components organisms and environment

  1. Space

  2. Air

  3. Troposphere

  4. Stratosphere

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Correct Option: A