NTA NEET Ecosystem Objective Questions,solutions,answerspdfs,mcqs

Ecosystem Mock Exam-7

Question No:1

Following are the differences between carbon and phosphorus cycle:

[A] Carbon cycle is sedimentary whereas phosphorus cycle is gaseous.
[B] Carbon cycle is not significantly affected by human activities whereas phosphorus is significantly affected.
[C] Carbon has respiratory release but not phosphorus. [D] All of the above

Question No:2

What price tag did Robert Constanza put for fundamental ecosystem services?

[A] 33 trillion US $
[B] 22 trillion US $
[C] 11 trillion US $ [D] 44 trillion US $

Question No:3

Global GNP is about:

[A] 33 trillion US $
[B] 18 trillion US $
[C] 12 trillion US $ [D] 22 trillion US $

Question No:4

Out of the total cost of various ecosystem services, the soil account for ______ %, recreation and nutrient cycling are less than ______ % and climate regulation and habitat for wildlife is about ______ % each.

[A] 50,6,10
[B] 50,10, 6
[C] 50, 30, 20 [D] 20, 30, 50

Question No:5

Which one of the following has the largest population in a food chain?

[A] Producers
[B] Primary consumers
[C] Secondary consumers [D] Decomposers

Question No:6

Following are ecosystem services:

[A] Purification of air and water by forest
[B] Crop pollination
[C] Nutrient cycling [D] All of the above

Question No:7

Following are the two main structural features of an ecosystem:
(A) Species composition
(B) Energy flow
(C) Decomposition
(D) Stratification

[A] A and D only
[B] B and C only
[C] A only [D] B, C and D only

Question No:8

Following are the reservoir of gaseous cycle:

[A] Atmosphere
[B] Earth curst
[C] Hydrosphere [D] Both (a) and (c)

Question No:9

Which of the following nutrient cycle is the most complex?

[A] Nitrogen cycle
[B] Phosphorous cycle
[C] Carbon cycle [D] Oxygen cycle

Question No:10

Biotic community is:

[A] Static
[B] Dynamic
[C] Group of population of same species in a given area [D] All of the above

Question No:11

Litter is decomposed by how many organisms among the following? Earthworm, Bacteria, Fungi, Mites

[A] 1
[B] 2
[C] 3 [D] 4

Question No:12

Following are ecosystem services except:

[A] Maintain biodiversity
[B] Crop pollination
[C] Storage site for carbon [D] Flood

Question No:13

In decomposition, complex organic compounds of detritus are converted to which of the following substances by decomposers?

[A] Carbon dioxide
[B] Water
[C] Inorganic nutrients [D] All of the above

Question No:14

Driving force for an ecosystem is:

[A] Primary producers
[B] Secondary producers
[C] Solar radiation [D] Food chain

Question No:15

Frog, snake and eagle belong to:

[A] Three trophic levels
[B] Two trophic levels
[C] Only one trophic level [D] None of these