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Important Questions: Environment - UPSC MCQ


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10 Questions MCQ Test - Important Questions: Environment

Important Questions: Environment for UPSC 2025 is part of UPSC preparation. The Important Questions: Environment questions and answers have been prepared according to the UPSC exam syllabus.The Important Questions: Environment MCQs are made for UPSC 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions: Environment below.
Solutions of Important Questions: Environment questions in English are available as part of our course for UPSC & Important Questions: Environment solutions in Hindi for UPSC course. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free. Attempt Important Questions: Environment | 10 questions in 15 minutes | Mock test for UPSC preparation | Free important questions MCQ to study for UPSC Exam | Download free PDF with solutions
Important Questions: Environment - Question 1
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Which of the following best defines the natural environment?

Detailed Solution for Important Questions: Environment - Question 1
The natural environment encompasses elements created by nature, including land, water, air, plants, and animals, which form the basis of life on Earth.
Important Questions: Environment - Question 2
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Identify the following figure 

Detailed Solution for Important Questions: Environment - Question 2

A desert ecosystem is defined by interactions between organism populations, the climate in which they live, and any other non-living influences on the habitat.

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Important Questions: Environment - Question 3
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What is the lithosphere?

Detailed Solution for Important Questions: Environment - Question 3
The lithosphere is the solid crust or the hard-top layer of the earth, composed of rocks and minerals, and is covered by a thin layer of soil.
Important Questions: Environment - Question 4
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Which of the following is a major component of the biotic environment?
Detailed Solution for Important Questions: Environment - Question 4
The biotic environment includes living components such as plants and animals, which interact and depend on each other for survival.
Important Questions: Environment - Question 5
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The ______ holds the atmosphere around the earth.
Detailed Solution for Important Questions: Environment - Question 5

The correct answer is:

c) Gravitational force 

Explanation:

  • The gravitational pull of the Earth is what holds the atmosphere in place.

  • Atmospheric pressure (a) is the force exerted by the weight of the air, but it doesn’t "hold" the atmosphere.

  • Pressure (b) is too general and doesn’t explain why the atmosphere stays around Earth.

  • The gravitational force (c) of the Earth holds the atmosphere around it.

  • Humidity (d) refers to moisture in the air, which is irrelevant.

Final Answer:
c) Gravitational Force

Important Questions: Environment - Question 6
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Aquariums are considered a natural ecosystem.
Detailed Solution for Important Questions: Environment - Question 6

Aquariums are not considered a natural ecosystem as they are human-made environments designed to replicate natural aquatic habitats for educational, recreational, or research purposes.

Important Questions: Environment - Question 7
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Which of the following are abiotic component?
(1) Soil
(2) Air
(3) Crab
(4) Water 
(5) Jellyfish
(6) Rocks
Detailed Solution for Important Questions: Environment - Question 7

Abiotic components are non-living elements of the environment. In this context:

  • Soil - A vital abiotic component that supports plant life.
  • Air - Essential for respiration in living organisms.
  • Water - Crucial for all forms of life.
  • Rocks - Non-living materials that form the Earth's crust.

In contrast, Crab and Jellyfish are living organisms, thus they are classified as biotic components.

Important Questions: Environment - Question 8
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What is the main function of the atmosphere?
Detailed Solution for Important Questions: Environment - Question 8
The atmosphere acts as a blanket of air that surrounds the earth, providing essential gases for breathing, protecting living organisms from harmful solar radiation, and helping to regulate temperature.
Important Questions: Environment - Question 9
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How do plants and animals depend on each other?
Detailed Solution for Important Questions: Environment - Question 9
Plants and animals are interdependent; plants provide food and habitats for animals, while animals assist in pollination and seed dispersal, facilitating plant reproduction and growth.
Important Questions: Environment - Question 10
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Which component is essential for the process of photosynthesis in plants?
Detailed Solution for Important Questions: Environment - Question 10
Photosynthesis in plants requires carbon dioxide, which is absorbed from the atmosphere, along with sunlight and water, to produce food and oxygen.
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