Ecosystem Test

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Ecosystem Test - 27

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Weekly Quiz Competition

Question 1
1 / -0

Phosphorus cycles in the form of ____________.

A
$HPO^{3-}$

B
$P^{2}$ (gas)

C
$PO_{4}^{3-}$

D
$Al_{2}(PO_{4})_{3}$

Solution

Phosphorus is obtained from soil as orthophosphate $(PO_{4}^{3-})$ . Organic phosphorus circulates in nature from plants to animals. Phosphate is released by decomposers (Phosphatising bacteria) back to soil.
Question 2
1 / -0

Phosphorus cycle is

A
Gaseous cycle

B
Perfect cycle

C
Imperfect cycle

D
Partly gaseous and partly sedimentary
Question 3
1 / -0

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

A
Carbon cycle

B
Phosphorous cycle

C
Nitrogen cycle

D
Water cycle
Question 4
1 / -0

Crystalline rocks are natural source of biogenetic element

A
Calcium

B
Phosphorus

C
Magnesium

D
Sodium

E
Sulpher
Question 5
1 / -0

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

A
Sulphur cycle

B
Phosphorus cycle

C
Nitrogen cycle

D
Carbon cycle
Question 6
1 / -0

Cycling of elements in an ecosystem is called

A
Chemical cycle

B
Geochemical cycle

C
Biogeochemical cycle

D
Geological cycle
Question 7
1 / -0

Volcano eruption disturbs

A
phosphorus cycle

B
Nitrogen cycle

C
Carbon cycle

D
Sulphur cycle
Question 8
1 / -0

Biogeochemical cycles are of _____________.

A
Two types

B
Three types

C
Four types

D
Five types

Solution

The biogeochemical cycles are classified into 2 types namely gaseous cycles like Nitrogen, Carbon dioxide and sedimentary cycles like Phosphorus and Sulphur.
So, the correct answer is 'Two types'
Question 9
1 / -0

In the phosphorus cycle, phosphate becomes available by weathering of rocks first to _____________.

A
Consumers

B
Producers

C
Decomposers

D
None of these

Solution

In the phosphorus cycle, weathering makes phosphate available to the soil from where plants or producers get them first.
So, the correct answer is 'Producers'
Question 10
1 / -0

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

A
Producer's cycle

B
Consumer's cycle

C
Decomposer's cycle

D
Biogeochemical cycle

Solution

Recycling of material is carried out by decomposers. If decomposers of an ecosystem vanish recycling of materials is stopped, thereby affecting the movement materials between the biotic and the abiotic systems that forms the biogeochemical cycle.
So, the correct answer is 'Biogeochemical cycle'

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Ecosystem Test - 27

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Ecosystem Test - 27

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Question 1

HPO3−HPO^{3-}HPO3−

P2P^{2}P2 (gas)

PO43−PO_{4}^{3-}PO43−​

Al2(PO4)3Al_{2}(PO_{4})_{3}Al2​(PO4​)3​

Solution

Question 2

Gaseous cycle

Perfect cycle

Imperfect cycle

Partly gaseous and partly sedimentary

Question 3

Carbon cycle

Phosphorous cycle

Nitrogen cycle

Water cycle

Question 4

Calcium

Phosphorus

Magnesium

Sodium

Sulpher

Question 5

Sulphur cycle

Phosphorus cycle

Nitrogen cycle

Carbon cycle

Question 6

Chemical cycle

Geochemical cycle

Biogeochemical cycle

Geological cycle

Question 7

phosphorus cycle

Nitrogen cycle

Carbon cycle

Sulphur cycle

Question 8

Two types

Three types

Four types

Five types

Solution

Question 9

Consumers

Producers

Decomposers

None of these

Solution

Question 10

Producer's cycle

Consumer's cycle

Decomposer's cycle

Biogeochemical cycle

Solution

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$HPO^{3-}$

$P^{2}$ (gas)

$PO_{4}^{3-}$

$Al_{2}(PO_{4})_{3}$