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Test: Nutrient Cycling (NCERT) - NEET MCQ


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10 Questions MCQ Test Biology Class 12 - Test: Nutrient Cycling (NCERT)

Test: Nutrient Cycling (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Nutrient Cycling (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Nutrient Cycling (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Nutrient Cycling (NCERT) below.
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Test: Nutrient Cycling (NCERT) - Question 1

Read the given statements and select the correct option.
Statement 1: Major reservoirs of phosphorus are phosphate rocks and fossil bone deposits laid down in the past geological ages.
Statement 2: During weathring of rocks, minute amounts of these phosphates dissolve in soil solution and are absorbed by the roots of the plants.

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 1

The major reservoir pool of phosphate ios rocks and fossil bone deposits laid down in past. Phosphate is component of nucleic acids, biomembrances, etc., and body structures of shells, bones and teeth. Its cyling pool is soil for terrestrial system and water for aquatic system. Smalll amount of phosphate is added through weathering of rocks.

Test: Nutrient Cycling (NCERT) - Question 2

Select the pairs of sedimentary biogeochemical cycles.
I. Hydrogen cycle and water cycle
II. Phosphorus cycle and sulphur cycle
III. Calcium cycle and magnesium cycle
IV. Carbon cycle and nitrogen cycle

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 2

Biogeochemical cycles can be grouped into 3 types:
(i) Gaseous cycle: Material involved in circulation are gases or vapours and the reservoir pool is the atmosphere or hydrosphere, e.g., nitrogen, carbon, hydrogen, oxygen and water cycle.
(ii) Sedimentary cycle: Materials involved in circulation are non-gaseous and the reservoir pool is lithosphere, e.g., phosphorus, calcium and magnesium cycle.
(iii) Mixed cycle (materials involved in circulation have both gaseous and non-gaseous states) eg., sulphur cycle.

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Test: Nutrient Cycling (NCERT) - Question 3

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

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 3

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
Test: Nutrient Cycling (NCERT) - Question 4

Study the given flow chart and select the correct statement regarding this.

(i) It represents phosphorus cycling in a terrestrial ecosystem.
(ii) It represents phosphorus cycling in an aquatic ecosystem.
(iii) Natural reservoir of phosphorus is phosphate rocks.
(iv) There is no respiratory release of phosphorus into atmosphere.
(v) Gaseous exchange of phosphorus between organisms and environment occurs to a considerable extent.

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 4

The flow chart represents phosphorus cycling in a terrestrial ecosystem because phosphorus cycle is a sedimentary cycle and its reservoir pool is lithosphere. Rocks are the natural reservoir of phosphorus, in the form of insoluble ferric and calcium phosphate. when rocks are weathered, minute amounts of these phosphates dissolve in soil solution and these inorganic phosphates (PO43-,HPO42-,or H2PO4) are absorbed by plants from the soil and water bodies and eventually pass into animals through food chains. There is no repiratory release of phosphorus. Gaseous exhcange of phosphorus between organisms and envirmonet are negligilbe.

Test: Nutrient Cycling (NCERT) - Question 5

Match column I with column II and select the correct option from the given codes.

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 5

Standing state is the amount of inorganic nutrients present anytime in the soil/water of ecosystem. Standing crop is the amount of living matter(or biomass) present in unit area of an ecosystem. Gaseous nutrient cycles are rapid and more perfect as compared to sedimentary nutrient cycles. It is because in gaseous cycles, nutrients remain in circulation more or less uniformly, whereas in sedimentary cycles, nutrients get out of circulation and constitute a relatively inactive, less perfect and immobile reservoir on earth's crust.

Test: Nutrient Cycling (NCERT) - Question 6

About 70% of total global carbon is found in

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 6

The cycling pool of carbon consists of 6 x 1014 kg (29%) of free CO2 in the atmosphere, 1.45 x 1015 kg (71%) of dissolved CO2 occurs in the oceans. Oceans also regulate the amount of CO2 in the atmosphere.

Test: Nutrient Cycling (NCERT) - Question 7

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

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 7

Phosphorus has a sedimentary cycle of matter Its reservoir pool is phosphate rocks while cycling pool is terrestrial and aquatic ecosystems. Atmosphere or gaseous phase is absent.

Test: Nutrient Cycling (NCERT) - Question 8

Read the given statements and select the correct option.
Statement 1: Global water cycle does not involve the living organisms.
Statement 2: In this cycle, water circulates between hydrosphere and atmosphere. 

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 8

Global water cycle consists of evaporation from water bodies (oceans, rivers, lakes etc.) and precipitation of water in the form of rain, snow and hail. Hence, water circulates between hydrosphere and atmosphere. It does not involve living organisms.

Test: Nutrient Cycling (NCERT) - Question 9

Which of the following is most important in water cycle? 

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 9

Evaporation from the oceans is the most important in water cycle, because it comprises of the major part of global water cycle.

Test: Nutrient Cycling (NCERT) - Question 10

Source of maximum sulphur is 

Detailed Solution for Test: Nutrient Cycling (NCERT) - Question 10

Sulphur occurs in nature as an element and also as sulphates in soil, water and rocks. Major reservoir of sulphur is sulphate rocks. Soil and water also receive sulphates from rocks. Rainwater running over rocks gradually wears away their surface and carries off sulphur with it. Some of this sulphur soaks into the soil and some reaches ponds and lakes. A large part of sulphur is carried by the rivers to the sea where it may get locked up in sedimentary rocks. Wind may also erode the rocks, and the materials may be blown into the air as dust. Rain washes a significant amount of this matter from the atmosphere into the oceans.

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