Tag: ecosystem : structure and function

Questions Related to ecosystem : structure and function

In phosphorus, cycle phosphorus enters an ecosystem, during which of the following processes?

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Weathering

  2. Respiration

  3. Photosynthesis

  4. Nitrification

  5. Condensation

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Correct Option: A
Explanation:
A. Weathering is the breakdown of rocks into smaller particles by the action of various environmental factors like wind, water, sunlight etc.
B. Respiration is the process by which living organisms derive energy by the oxidation of various complex organic substances.
C. Photosynthesis is the process by which green plants capture solar energy and convert it into light energy.
D. Nitrification is the conversion of ammonia into nitrates and is performed in two steps, nitrite formation and nitrate formation.
E. Condensation is the process by which gas changes into liquid drops.
Since rocks are made up of phosphorus and contain phosphates, their weathering will cause dissolution of phosphates in the soil and thus, phosphorus enters the ecosystem.
So, the correct answer is 'Weathering'.

Reservior of sulphur is

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Rocks

  2. Oceans

  3. Atmosphere

  4. Lakes

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Correct Option: A
Explanation:

Rocks are the reservior of sulphur as the sulphur is present in the form of iron pyrites (FeS2)  and gypsum (CaSO4) in rocks.

Thus, the correct answer is option A.

Crystalline rocks are natural source of biogenetic element

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Calcium

  2. Phosphorus

  3. Magnesium

  4. Sodium

  5. Sulpher

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Correct Option: B

Phosphorus cycle is

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Gaseous cycle

  2. Perfect cycle

  3. Imperfect cycle

  4. Partly gaseous and partly sedimentary

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Correct Option: C

Volcano eruption disturbs

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. phosphorus cycle

  2. Nitrogen cycle

  3. Carbon cycle

  4. Sulphur cycle

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Correct Option: A

In which of the following cycles does the reservoir of the
nutrient exist in material from

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Carbon cycle

  2. Phosphorous cycle

  3. Nitrogen cycle

  4. Water cycle

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Correct Option: B

Which one is a sedimentary cycle?

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Oxygen cycle

  2. Nitrogen cycle

  3. Hydrogen cycle

  4. Phosphorus cycle

  5. Carbon cycle

Show answer
Correct Option: D
Explanation:

There are 4 layers of Earth, namely lithosphere (land), hydrosphere (water), biosphere (living), and atmosphere (air). Lithosphere of Earth makes up the hard and rigid outer layer of the Earth. It is reservoir of phosphorus. The largest reservoir of phosphorus is sediments or sedimentary rocks. Hence, phosphorous cycle represents sedimentary type of nutrient cycle or simply sedimentary cycle.

Thus, the correct answer is 'Phosphorous cycle.' 

Natural reservoir of phosphorus is :

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Sea water

  2. Animal bones

  3. Rock

  4. Fossils

Show answer
Correct Option: C
Explanation:
The natural reservoir of phosphate is the rock which contains phosphorus in the form of phosphates when rocks are weathered, minute amounts of these phosphate dissolve in soil solution and are absorbed by the roots of the plants. Herbivores and other animals obtain this element from plants.

So, the correct answer is 'Rock'.

Which one is the Sedimentary Cycle?

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Oxygen Cycle

  2. Nitrogen Cycle

  3. Hydrogen Cycle

  4. Phosphorus Cycle

Show answer
Correct Option: D
Explanation:

Sedimentary cycles are those cycles that involve earthbound elements like, calcium, sulfur, phosphorous etc. The phosphorus cycle does not involve the atmosphere, it mainly cycles through water, soil and sediments. 


So, the correct option is 'Phosphorous cycle'.

Which one of the following is sedimentary cycle? 

zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

  1. Carbon

  2. Hydrogen

  3. Nitrogen

  4. Phosphorus

Show answer
Correct Option: D
Explanation:

Sedimentary cycles are those cycles which include the weathering of rocks and erosion of minerals along with its circulation in the environment and back to earth crust. It includes those of iron, calcium, phosphorus and other more earthbound elements. It is the other name of phosphorus cycle. It is because of the sedimentary rocks, as well as the other type of rocks on weathering, gives rise to the cycling of phosphorus.

So, the correct answer is option D.