UPSC Static Quiz – Environment : 10 December 2025
Kartavya Desk Staff
UPSC Static Quiz – Environment : 10 December 2025 We will post 5 questions daily on static topics mentioned in the UPSC civil services preliminary examination syllabus. Each week will focus on a specific topic from the syllabus, such as History of India and Indian National Movement, Indian and World Geography, and more. We are excited to bring you our daily UPSC Static Quiz, designed to help you prepare for the UPSC Civil Services Preliminary Examination. Each day, we will post 5 questions on static topics mentioned in the UPSC syllabus. This week, we are focusing on Indian and World Geography.
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• Question 1 of 5 1. Question Which of the following best defines the Biosphere? a) It is the upper region of lithosphere. b) It is the abiotic component of all forms on earth. c) It is the lower atmospheric region near the hydrosphere. d) It is the narrow zone where land, water and air come together to contain life forms. Correct Solution: D The solid portion of the earth on which we live is called the Lithosphere. The gaseous layers that surround the earth, is the Atmosphere, where oxygen, nitrogen, carbon dioxide and other gases are found. Water covers a very big area of the earth’s surface and this area is called the Hydrosphere. The Hydrosphere comprises water in all its forms, that is, ice, water and water vapour. The Biosphere is the narrow zone where we find land, water and air together, which contains all forms of life. Incorrect Solution: D The solid portion of the earth on which we live is called the Lithosphere. The gaseous layers that surround the earth, is the Atmosphere, where oxygen, nitrogen, carbon dioxide and other gases are found. Water covers a very big area of the earth’s surface and this area is called the Hydrosphere. The Hydrosphere comprises water in all its forms, that is, ice, water and water vapour. The Biosphere is the narrow zone where we find land, water and air together, which contains all forms of life.
#### 1. Question
Which of the following best defines the Biosphere?
• a) It is the upper region of lithosphere.
• b) It is the abiotic component of all forms on earth.
• c) It is the lower atmospheric region near the hydrosphere.
• d) It is the narrow zone where land, water and air come together to contain life forms.
Solution: D
The solid portion of the earth on which we live is called the Lithosphere.
The gaseous layers that surround the earth, is the Atmosphere, where oxygen, nitrogen, carbon dioxide and other gases are found.
Water covers a very big area of the earth’s surface and this area is called the Hydrosphere. The Hydrosphere comprises water in all its forms, that is, ice, water and water vapour.
The Biosphere is the narrow zone where we find land, water and air together, which contains all forms of life.
Solution: D
The solid portion of the earth on which we live is called the Lithosphere.
The gaseous layers that surround the earth, is the Atmosphere, where oxygen, nitrogen, carbon dioxide and other gases are found.
Water covers a very big area of the earth’s surface and this area is called the Hydrosphere. The Hydrosphere comprises water in all its forms, that is, ice, water and water vapour.
The Biosphere is the narrow zone where we find land, water and air together, which contains all forms of life.
• Question 2 of 5 2. Question Geographically which among the following is the largest system? a) Population b) Community c) Ecosystem d) Biome Correct Solution: D Ecosystem is the groups of organisms from all biological domains in conjunction with the physical (abiotic) environment. Biome is the continental scale (climatically and geographically contiguous areas with similar climatic conditions) grouping of ecosystems. Biosphere or Ecosphere is all life plus the physical (abiotic) environment. Incorrect Solution: D Ecosystem is the groups of organisms from all biological domains in conjunction with the physical (abiotic) environment. Biome is the continental scale (climatically and geographically contiguous areas with similar climatic conditions) grouping of ecosystems. Biosphere or Ecosphere is all life plus the physical (abiotic) environment.
#### 2. Question
Geographically which among the following is the largest system?
• a) Population
• b) Community
• c) Ecosystem
Solution: D
Ecosystem is the groups of organisms from all biological domains in conjunction with the physical (abiotic) environment.
Biome is the continental scale (climatically and geographically contiguous areas with similar climatic conditions) grouping of ecosystems.
Biosphere or Ecosphere is all life plus the physical (abiotic) environment.
Solution: D
Ecosystem is the groups of organisms from all biological domains in conjunction with the physical (abiotic) environment.
Biome is the continental scale (climatically and geographically contiguous areas with similar climatic conditions) grouping of ecosystems.
Biosphere or Ecosphere is all life plus the physical (abiotic) environment.
• Question 3 of 5 3. Question Which of the following statements is incorrectly stated? a) Alpha diversity refers to diversity within a particular area or ecosystem. b) Gamma diversity is studied at a very large scale, say a biome c) Food chain is more comprehensive than food web in displaying possible transfers of energy. d) None of the statements (a), (b), and (c) are incorrect. Correct Solution: C Alpha diversity Alpha diversity describes the species diversity within a community at a small scale or local scale, generally the size of one ecosystem. When we casually speak of diversity in an area, more often than not it refers to alpha diversity. Beta diversity Beta diversity describes the species diversity between two communities or ecosystems. It is at a larger scale, and looks to compare the species diversity between two separate entities that are often divided by a clear geographical barrier like a river or a mountain ridge. Gamma diversity Gamma diversity is studied at a very large scale—a biome—where species diversity is compared between many ecosystems. It could range over areas like the entire slope of a mountain, or the entire littoral zone of a sea shore. Example: Let’s take a mountain slope as our landscape. On this slope, there will be many different patches of forests and grasslands. Alpha diversity is the species diversity present within each forest or grassland patch of the slope. Beta diversity is represented by the species diversity between any two patches and their communities. Gamma diversity of the landscape is the species diversity along the entire range of the mountain slope. Food web is more comprehensive than food chain. Incorrect Solution: C Alpha diversity Alpha diversity describes the species diversity within a community at a small scale or local scale, generally the size of one ecosystem. When we casually speak of diversity in an area, more often than not it refers to alpha diversity. Beta diversity Beta diversity describes the species diversity between two communities or ecosystems. It is at a larger scale, and looks to compare the species diversity between two separate entities that are often divided by a clear geographical barrier like a river or a mountain ridge. Gamma diversity Gamma diversity is studied at a very large scale—a biome—where species diversity is compared between many ecosystems. It could range over areas like the entire slope of a mountain, or the entire littoral zone of a sea shore. Example: Let’s take a mountain slope as our landscape. On this slope, there will be many different patches of forests and grasslands. Alpha diversity is the species diversity present within each forest or grassland patch of the slope. Beta diversity is represented by the species diversity between any two patches and their communities. Gamma diversity of the landscape is the species diversity along the entire range of the mountain slope. Food web is more comprehensive than food chain.
#### 3. Question
Which of the following statements is incorrectly stated?
• a) Alpha diversity refers to diversity within a particular area or ecosystem.
• b) Gamma diversity is studied at a very large scale, say a biome
• c) Food chain is more comprehensive than food web in displaying possible transfers of energy.
• d) None of the statements (a), (b), and (c) are incorrect.
Solution: C
Alpha diversity
Alpha diversity describes the species diversity within a community at a small scale or local scale, generally the size of one ecosystem. When we casually speak of diversity in an area, more often than not it refers to alpha diversity.
Beta diversity
Beta diversity describes the species diversity between two communities or ecosystems. It is at a larger scale, and looks to compare the species diversity between two separate entities that are often divided by a clear geographical barrier like a river or a mountain ridge.
Gamma diversity
Gamma diversity is studied at a very large scale—a biome—where species diversity is compared between many ecosystems. It could range over areas like the entire slope of a mountain, or the entire littoral zone of a sea shore.
Example: Let’s take a mountain slope as our landscape. On this slope, there will be many different patches of forests and grasslands. Alpha diversity is the species diversity present within each forest or grassland patch of the slope. Beta diversity is represented by the species diversity between any two patches and their communities. Gamma diversity of the landscape is the species diversity along the entire range of the mountain slope.
Food web is more comprehensive than food chain.
Solution: C
Alpha diversity
Alpha diversity describes the species diversity within a community at a small scale or local scale, generally the size of one ecosystem. When we casually speak of diversity in an area, more often than not it refers to alpha diversity.
Beta diversity
Beta diversity describes the species diversity between two communities or ecosystems. It is at a larger scale, and looks to compare the species diversity between two separate entities that are often divided by a clear geographical barrier like a river or a mountain ridge.
Gamma diversity
Gamma diversity is studied at a very large scale—a biome—where species diversity is compared between many ecosystems. It could range over areas like the entire slope of a mountain, or the entire littoral zone of a sea shore.
Example: Let’s take a mountain slope as our landscape. On this slope, there will be many different patches of forests and grasslands. Alpha diversity is the species diversity present within each forest or grassland patch of the slope. Beta diversity is represented by the species diversity between any two patches and their communities. Gamma diversity of the landscape is the species diversity along the entire range of the mountain slope.
Food web is more comprehensive than food chain.
• Question 4 of 5 4. Question Which one of the following is the best description of the term ‘standing crop’? a) It is the total mass of living material at a particular time in an ecosystem. b) It is the number of primary producers in an ecosystem. c) It is the amount of biomass of a forest. d) It is the total amount of energy produced in a food chain. Correct Solution: A Standing crop is defined as the total amount or number of living things or of one kind of living thing (such as an uncut farm crop, the fish in a pond, or organisms in an ecosystem) in a particular area at any given time. Incorrect Solution: A Standing crop is defined as the total amount or number of living things or of one kind of living thing (such as an uncut farm crop, the fish in a pond, or organisms in an ecosystem) in a particular area at any given time.
#### 4. Question
Which one of the following is the best description of the term ‘standing crop’?
• a) It is the total mass of living material at a particular time in an ecosystem.
• b) It is the number of primary producers in an ecosystem.
• c) It is the amount of biomass of a forest.
• d) It is the total amount of energy produced in a food chain.
Solution: A
Standing crop is defined as the total amount or number of living things or of one kind of living thing (such as an uncut farm crop, the fish in a pond, or organisms in an ecosystem) in a particular area at any given time.
Solution: A
Standing crop is defined as the total amount or number of living things or of one kind of living thing (such as an uncut farm crop, the fish in a pond, or organisms in an ecosystem) in a particular area at any given time.
• Question 5 of 5 5. Question Which of the following ecological pyramids is/are upright in pond ecosystem? Pyramid of energy Pyramid of biomass Pyramid of number How many of the above options is/are correct? a) Only one b) Only two c) All three d) None Correct Solution: B Option 2 is incorrect. Pyramid of energy and number is upright in pond ecosystem. Pyramid of biomass is inverted in an aquatic ecosystem because the biomass of fishes far exceeds the biomass of phytoplanktons. Incorrect Solution: B Option 2 is incorrect. Pyramid of energy and number is upright in pond ecosystem. Pyramid of biomass is inverted in an aquatic ecosystem because the biomass of fishes far exceeds the biomass of phytoplanktons.
#### 5. Question
Which of the following ecological pyramids is/are upright in pond ecosystem?
• Pyramid of energy
• Pyramid of biomass
• Pyramid of number
How many of the above options is/are correct?
• a) Only one
• b) Only two
• c) All three
Solution: B
Option 2 is incorrect.
Pyramid of energy and number is upright in pond ecosystem. Pyramid of biomass is inverted in an aquatic ecosystem because the biomass of fishes far exceeds the biomass of phytoplanktons.
Solution: B
Option 2 is incorrect.
Pyramid of energy and number is upright in pond ecosystem. Pyramid of biomass is inverted in an aquatic ecosystem because the biomass of fishes far exceeds the biomass of phytoplanktons.
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