Environment & Ecology

56 questions available

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All Ecosystem 56 Food Chain 1 Biodiversity 1 Pollution 6 Global Warming 3 Climate Change Ozone Layer 2 Natural Resources 2
Showing 1–20 of 56

Q1.Final stage in ecosystem?

Hard
A Climax Community
B Bottom Community
C Both
D None of the above
Ecosystem PPSC 2026

Correct Answer: A

Q2.The final, stable and self sustaining community of ecological succession:

Hard
A Climax
B Bottom
C Moderate
D None of these
Ecosystem PPSC 2026

Correct Answer: A

Q3.Two and many populations of species called?

Hard
A Community
B Settlement
C Group
D None of these
Ecosystem PPSC 2026

Correct Answer: A

Q4.Ozone layer safe earth from which of the following rays

Easy
A UV RAYS
B Infrared Rays
C Visible Light
D All of these
Ecosystem PPSC 2024

Correct Answer: A

Q5.20 to 25 percent wind erosion caused by:

Easy
A Surface roll
B Friction
C Surface Creep
D Shrinkage
Ecosystem PPSC 2024

Correct Answer: C

Q6.When the last member of a particular species dies, the species is said to be __.

Easy
A isolated
B Diversified
C Extinct
D None of These
Ecosystem PPSC 2024

Correct Answer: C

Q7.Which term refers to a species that has no living individuals remaining?

Easy
A Threatened
B Vulnerable
C Endangered
D Extinct
Ecosystem PPSC 2024

Correct Answer: D

Q8.Most of the ozone in the atmosphere is concentrated in the:

Easy
A Mesosphere
B Troposphere
C Stratosphere
D Ionosphere
Ecosystem PPSC 2020

Correct Answer: C

Q9.Ozone layer protects life on the Earth from:

Easy
A Ultraviolet rays
B Greenhouse gases
C Nitrogen
D Hydrogen
Ecosystem PPSC 2020

Correct Answer: A

Q10.Removal of top siol by wind or water is called ?

Easy
A Erosion
B Food
C Water logging
D Creeping
Ecosystem PPSC 2020

Correct Answer: A

Q11.What is the harm from the depletion of Earth's Ozone Layer?

Easy
A The average operation of the Earth's surface will increase gradually
B The oxygen content of the atmosphere will decrease
C Increased amount of UV rays will reach Earth's surface
D Sea levels will rise as the polar ice caps will gradually melt
Ecosystem PPSC 2020

Correct Answer: C

Q12.Depletion of the ozone layer is caused due to:

Easy
A Ferrocene
B Fullerenes
C Freons
D Polyhalogens
Ecosystem PMS 2020

Correct Answer: C

Q13.The united Nations General Assembly has declared the decade 2021 .30 as?

Easy
A The decade on ecosystem restoration
B The decade for the rehabilitation of refugees
C The decade for environmental Change
D The decade for peade and stability
Ecosystem PMS 2020

Correct Answer: A

Q14.What will happen if ozone layer disppears?

Easy
A UV Rays do not reach earth
B UV Rays reach earth
C X Rays breach the earth surface
D Alpha Rays damage the Troposphere
Ecosystem PPSC 2020

Correct Answer: B

Q15.Indus River Plain is formed by?

Easy
A Wind erosion
B Volcanic activity
C Glacial movement
D River deposition
Ecosystem PPSC 2025

Correct Answer: D

Q16.Which layer of atmosphere contain the ozone layer?

Easy
A Low stratosphere
B High stratosphere
C Troposphere
D Mesosphere
Ecosystem PPSC 2025

Correct Answer: A

Q17.Which gas effects the Ozone Layer ?

Easy
A CFSc
B Hydrogen
C Oxygen
D Helium
Ecosystem PPSC 2025

Correct Answer: A

Q18.Main cause of Ozone layer depletion?

Easy
A CFCs
B Nitrogen
C Oxygen
D None of these
Ecosystem PPSC 2025

Correct Answer: A

Q19.Soil erosion is caused by?

Easy
A Deforestation
B Residual
C Leaching
D None of these
Ecosystem PPSC 2025

Correct Answer: A

Q20.Which of the following is the feature of erosion except

Easy
A Yardangs
B Earth Pillar
C Monoliths
D None of these
Ecosystem PPSC 2022

Correct Answer: C

Monoliths is the feature of erosion except.