Tag: species, communities and ecosystems

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Questions Related to species, communities and ecosystems

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

Which of the following are the examples of biogeochemical cycle?

  1. Nitrogen cycle

  2. Krebs cycle

  3. Electron cycle

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

The reservoir pool for gaseous cycles of matter is

  1. Atmosphere

  2. Hydrosphere

  3. Both (A) and (B)

  4. Lithosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Study of biogeochemical cycles is called as biogeochemistry, it involves

  1. Cycling of energy

  2. Cycling of gases

  3. Cycling of nutrients

  4. Cycling of water
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

Cycling of elements in an ecosystem is called as

  1. Chemical cycle

  2. Geochemical cycle

  3. Biogeochemical cycle

  4. Geological cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
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'
Multiple choice botany energy flow in an ecosystem biogeochemical cycle nutrient cycles species, communities and ecosystems

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

  1. Producer's cycle

  2. Consumer's cycle

  3. Decomposer's cycle

  4. Biogeochemical cycle
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Phosphorus and carbon dioxide

  2. Oxygen and nitrogen

  3. Phosphorus and nitrogen

  4. Phosphorus and sulphur
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phosphorus and sulfur both have sedimentary biogeochemical cycles - they cycle through rocks, soil, and sediments. Carbon and oxygen have gaseous cycles (CO2 in atmosphere). Nitrogen has a predominantly gaseous cycle (N2 atmosphere). The correct pair is phosphorus and sulfur.

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

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

  1. All consumer will die

  2. Energy cycle will be inverted

  3. Balance of biogeochemical cycle will be disturbed

  4. Only herbivores will die
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Oxygen

  2. Nitrogen

  3. Carbon

  4. Water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrogen is essential for producing proteins (amino acids contain nitrogen) and nucleic acids (DNA/RNA nitrogenous bases). While carbon and oxygen are also crucial, nitrogen is specifically required for these macromolecules. Water is a solvent, not a building block.

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

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

  1. Sulphur cycle

  2. Phosphorus cycle

  3. Nitrogen cycle

  4. Carbon cycle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogeochemical cycles like carbon, nitrogen, and sulphur have gaseous phases where elements circulate through the atmosphere. The phosphorus cycle is different - it's a sedimentary cycle that moves through soil, water, and rock but doesn't have a significant atmospheric gaseous phase.

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

Cycling of elements in an ecosystem is called

  1. Chemical cycle

  2. Geochemical cycle

  3. Biogeochemical cycle

  4. Geological cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biogeochemical cycles refer to the movement of chemical elements between living organisms and the non-living environment (atmosphere, hydrosphere, lithosphere). The term combines 'bio' (living organisms), 'geo' (earth/rocks), and 'chemical' (chemical processes).