Tag: zoology

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Questions Related to zoology

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

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

  1. Weathering

  2. Respiration

  3. Photosynthesis

  4. Nitrification

  5. Condensation
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

Crystalline rocks are natural source of biogenetic element

  1. Calcium

  2. Phosphorus

  3. Magnesium

  4. Sodium

  5. Sulpher
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phosphorus is primarily found in the Earth's crust in the form of phosphate rocks, which are crystalline in nature. It is released into the ecosystem through the weathering of these rocks.

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

Phosphorus cycle is

  1. Gaseous cycle

  2. Perfect cycle

  3. Imperfect cycle

  4. Partly gaseous and partly sedimentary
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The phosphorus cycle is considered an imperfect cycle because a significant portion of phosphorus is lost to deep ocean sediments and is not readily recycled back into the biosphere on a short timescale.

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

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

  1. Carbon cycle

  2. Phosphorous cycle

  3. Nitrogen cycle

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

The phosphorus cycle is a sedimentary cycle, meaning its primary reservoir is in the Earth's crust (rocks and sediments) rather than the atmosphere.

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

Which one is a sedimentary cycle?

  1. Oxygen cycle

  2. Nitrogen cycle

  3. Hydrogen cycle

  4. Phosphorus cycle

  5. Carbon cycle
Reveal answer Fill a bubble to check yourself
D Correct answer
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.' 

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

Natural reservoir of phosphorus is :

  1. Sea water

  2. Animal bones

  3. Rock

  4. Fossils
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

Which one is the Sedimentary Cycle?

  1. Oxygen Cycle

  2. Nitrogen Cycle

  3. Hydrogen Cycle

  4. Phosphorus Cycle
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Which one of the following is sedimentary cycle? 

  1. Carbon

  2. Hydrogen

  3. Nitrogen

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