Tag: living in harmony

Questions Related to living in harmony

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

Sunlight passes through a thicker portion of the atmosphere at

biology living in harmony climate factors abiotic components organisms and environment

  1. Sunrise

  2. Noon

  3. Sunset

  4. Both a and c

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Correct Option: D

In which ecosystem sun is main source of energy?

biology living in harmony climate factors abiotic components organisms and environment

  1. Fuel power ecosystem

  2. Man subsidized solar power ecosystem

  3. Unsubsidized natural solar powered ecosystem

  4. Naturally subsidized solar powered ecosystem

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Correct Option: D

Mangroves and estuaries, less dependent on

biology living in harmony climate factors abiotic components organisms and environment

  1. Animals

  2. Sunlight

  3. Inorganic

  4. Organic factors

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Correct Option: B

The creating force of any ecosystem is

biology living in harmony climate factors abiotic components organisms and environment

  1. Organic fuels, carbohydrates

  2. Biomass

  3. Solar energy

  4. Producers

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Correct Option: C
Explanation:

Nearly all of the energy, that drives ecosystems ultimately comes from the sun. 

Solar energy, which is an abiotic factor, enters the ecosystem through the process of photosynthesis. The organisms in an ecosystem, that capture the sun's electromagnetic energy and convert it into chemical energy are called as producers. 
Producers include all of the green plants and some bacteria and algae. The primary consumers exclusively feed on producers. They are known as herbivores. Primary consumers only obtain a fraction of the total solar energy about 10% captured by the producers they eat. 
The other 90% is used by the producer for growth, reproduction, and survival, or it is lost as heat. Primary consumers are eaten by secondary consumers. Secondary consumers are eaten by tertiary consumers.