Tag: species, communities and ecosystems

Questions Related to species, communities and ecosystems

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

Which one of the following is not a gaseous biogeochemical
cycle in ecosystem

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

  1. Sulphur cycle

  2. Phosphorus cycle

  3. Nitrogen cycle

  4. Carbon cycle

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Correct Option: B

Cycling of elements in an ecosystem is called

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