Tag: energy flow in an ecosystem

Questions Related to energy flow in an ecosystem

Which one of the following is not one of the three aspects studied in biogeochemical cycling?

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. The nature and size of natural reservoir

  2. The rate of movement between reservoirs

  3. Interaction between different biogeochemical cycles

  4. Creation of their own biogeochemical cycles by new species

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Correct Option: D
Explanation:
The cyclic movement of the elements from the abiotic system to the biotic system and back again is the biogeochemical cycle. These chemicals form the compounds of food, so these are also known as nutrient cycles.
Some of the important biogeochemical cycles are carbon cycle, Oxygen cycle nitrogen cycle, Phosphorus cycle.
Following aspect are studied in biogeochemical cycling-
The nature and size of the natural reservoir
The rate of movement between reservoirs
The interaction between different biogeochemical cycles
The correct option is the 'creation of their own biogeochemical cycles by new species'

The reservoir for the gaseous type of biogeochemical cycle exists in.

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Stratosphere

  2. Atmosphere

  3. Ionosphere

  4. Lithosphere

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Correct Option: B
Explanation:

The reservoir for gaseous type of nutrient cycles, e.g., nitrogen, carbon cycle exist in the atmosphere.

Which of the following are the examples of biogeochemical cycle?

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Nitrogen cycle

  2. Krebs cycle

  3. Electron cycle

  4. All of the above

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Correct Option: A
Explanation:

A biogeochemical cycle involves biological, geological and chemical factors. The circulation of chemical nutrients like carbon, oxygen, nitrogen, phosphorus, calcium, and water, etc. between biotic and abiotic components of the biosphere is known as a biogeochemical cycle.
So, the correct option is option A.

The reservoir pool for gaseous cycles of matter is

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Atmosphere

  2. Hydrosphere

  3. Both (A) and (B)

  4. Lithosphere

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Correct Option: A
Explanation:

Biogeochemical cycles involves the exchange of minerals between abiotic and biotic components of the biosphere. It is mainly of three types hydrological, gaseous and sedimentary.
Gaseous cycle involves the transportation of matter through the atmosphere. Some examples of the gaseous cycle are carbon cycle, nitrogen cycle, oxygen cycle.
So, the correct answer is option A.

Study of biogeochemical cycles is called as biogeochemistry, it involves

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Cycling of energy

  2. Cycling of gases

  3. Cycling of nutrients

  4. Cycling of water

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Correct Option: C
Explanation:

The term biogeochemical cycle is used for exchange or circulation of biogenetic nutrients between living and nonliving components of biosphere. Cycling of biogenetic nutrients is an important characteristic of an ecosystem. 

Cycling of elements in an ecosystem is called as

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Chemical cycle

  2. Geochemical cycle

  3. Biogeochemical cycle

  4. Geological cycle

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Correct Option: C
Explanation:
The term biogeochemical cycle is used for exchange or circulation of biogenetic nutrients between living and non living components of biospheres. The biogenetic nutrients are essential elements required by organisms for their body-building and metabolism which are provided by earth and returned to earth after the death of organisms and/or through excreta of animals
So, the correct answer is 'Biogeochemical cycle'

Which of the following cycle would be affected if decomposers of an ecosystem vanish?

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Producer's cycle

  2. Consumer's cycle

  3. Decomposer's cycle

  4. Biogeochemical cycle

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Correct Option: D
Explanation:

The term biogeochemical cycles is used for exchange or circulation of biogenetic nutrients between living and nonliving components of biosphere. Biogenetic nutrients are essential elements required by organisms for their body building and metabolism, which are provided by earth and returned to earth after their death by the decomposition activity of decomposers. If decomposition is not carried out then biogenetic nutrients will slowly become locked up in the bodies of plants and animals and ultimately the biogeochemical cycles will stop.

Which one of the following pairs is a sedimentary type of biogeochemical cycle

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Phosphorus and carbon dioxide

  2. Oxygen and nitrogen

  3. Phosphorus and nitrogen

  4. Phosphorus and sulphur

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Correct Option: D

If all decomposers are removed from an ecosystem, what will happen?

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. All consumer will die

  2. Energy cycle will be inverted

  3. Balance of biogeochemical cycle will be disturbed

  4. Only herbivores will die

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Correct Option: C
Explanation:

Decomposers are saprotrophs, which decompose the organic remains by secreting extracellular digestive enzymes. Due to degradation of organic remains, decomposers are also called as reducers. They are also known as mineralisers as they release minerals trapped in organic remains. Detrivores are decomposers as well as scavengers, e.g., earthworm. Decomposition of organic wastes and dead and decaying plants and animals returns the minerals locked in living systems back to the environment. Thus, decomposition is very important for the biogeochemical cycles, or nutrient cycling.

Living organisms require ............. to produce proteins and nucleic acids in their body.

botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

  1. Oxygen

  2. Nitrogen

  3. Carbon

  4. Water

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Correct Option: B