UPSC Static Quiz – Environment : 19 July 2025
Kartavya Desk Staff
UPSC Static Quiz – Environment : 19 July 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 Consider the following statements regarding Vegetative Propagation. Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds. Vegetative propagation is not possible from the plants that have lost the capacity to produce seeds. Plants produced through vegetative propagation are genetically similar enough to the parent plant. How many of the above statements is/are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: B Statement 2 is incorrect. There are many plants in which parts like the root, stem and leaves develop into new plants under appropriate conditions. This property of vegetative propagation is used in methods such as layering or grafting to grow many plants like sugarcane, roses, or grapes for agricultural purposes. Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds. Such methods also make possible the propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. Another advantage of vegetative propagation is that all plants produced are genetically similar enough to the parent plant to have all its characteristics. Incorrect Solution: B Statement 2 is incorrect. There are many plants in which parts like the root, stem and leaves develop into new plants under appropriate conditions. This property of vegetative propagation is used in methods such as layering or grafting to grow many plants like sugarcane, roses, or grapes for agricultural purposes. Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds. Such methods also make possible the propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. Another advantage of vegetative propagation is that all plants produced are genetically similar enough to the parent plant to have all its characteristics.
#### 1. Question
Consider the following statements regarding Vegetative Propagation.
• Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds.
• Vegetative propagation is not possible from the plants that have lost the capacity to produce seeds.
• Plants produced through vegetative propagation are genetically similar enough to the parent plant.
How many of the above statements is/are correct?
• (a) Only one
• (b) Only two
• (c) All three
Solution: B
Statement 2 is incorrect.
There are many plants in which parts like the root, stem and leaves develop into new plants under appropriate conditions. This property of vegetative propagation is used in methods such as layering or grafting to grow many plants like sugarcane, roses, or grapes for agricultural purposes. Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds. Such methods also make possible the propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. Another advantage of vegetative propagation is that all plants produced are
genetically similar enough to the parent plant to have all its characteristics.
Solution: B
Statement 2 is incorrect.
There are many plants in which parts like the root, stem and leaves develop into new plants under appropriate conditions. This property of vegetative propagation is used in methods such as layering or grafting to grow many plants like sugarcane, roses, or grapes for agricultural purposes. Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds. Such methods also make possible the propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. Another advantage of vegetative propagation is that all plants produced are
genetically similar enough to the parent plant to have all its characteristics.
• Question 2 of 5 2. Question An ecological pyramid is a diagrammatic presentation to describe trophic levels. How does the knowledge of ecological pyramid can help us in conservation of an ecosystem? It helps us to identify bio-accumulation. It helps us to identify bio-magnification. It helps us to recognize an invasive species. Select the correct answer code: a) 1, 3 b) 1, 2, 3 c) 2, 3 d) 1, 2 Correct Solution: D Ecological pyramids represent the structure of ecosystems by illustrating the distribution of energy, biomass, or number of organisms across various trophic levels. This visual model is crucial for understanding ecological balance and helps in ecosystem conservation by revealing how energy flows and matter cycles. Statements 1 and 2 are correct — knowledge of the pyramid helps track bioaccumulation, where toxic substances like heavy metals accumulate in organisms at lower trophic levels, and biomagnification, where these toxins become more concentrated at higher trophic levels. This understanding is vital for monitoring ecosystem health and taking corrective actions to protect apex consumers. However, statement 3 is incorrect — ecological pyramids do not directly help identify invasive species, as these models do not distinguish between native and non-native species. Incorrect Solution: D Ecological pyramids represent the structure of ecosystems by illustrating the distribution of energy, biomass, or number of organisms across various trophic levels. This visual model is crucial for understanding ecological balance and helps in ecosystem conservation by revealing how energy flows and matter cycles. Statements 1 and 2 are correct — knowledge of the pyramid helps track bioaccumulation, where toxic substances like heavy metals accumulate in organisms at lower trophic levels, and biomagnification, where these toxins become more concentrated at higher trophic levels. This understanding is vital for monitoring ecosystem health and taking corrective actions to protect apex consumers. However, statement 3 is incorrect — ecological pyramids do not directly help identify invasive species, as these models do not distinguish between native and non-native species.
#### 2. Question
An ecological pyramid is a diagrammatic presentation to describe trophic levels. How does the knowledge of ecological pyramid can help us in conservation of an ecosystem?
• It helps us to identify bio-accumulation.
• It helps us to identify bio-magnification.
• It helps us to recognize an invasive species.
Select the correct answer code:
• b) 1, 2, 3
Solution: D
• Ecological pyramids represent the structure of ecosystems by illustrating the distribution of energy, biomass, or number of organisms across various trophic levels. This visual model is crucial for understanding ecological balance and helps in ecosystem conservation by revealing how energy flows and matter cycles.
• Statements 1 and 2 are correct — knowledge of the pyramid helps track bioaccumulation, where toxic substances like heavy metals accumulate in organisms at lower trophic levels, and biomagnification, where these toxins become more concentrated at higher trophic levels. This understanding is vital for monitoring ecosystem health and taking corrective actions to protect apex consumers.
• However, statement 3 is incorrect — ecological pyramids do not directly help identify invasive species, as these models do not distinguish between native and non-native species.
Solution: D
• Ecological pyramids represent the structure of ecosystems by illustrating the distribution of energy, biomass, or number of organisms across various trophic levels. This visual model is crucial for understanding ecological balance and helps in ecosystem conservation by revealing how energy flows and matter cycles.
• Statements 1 and 2 are correct — knowledge of the pyramid helps track bioaccumulation, where toxic substances like heavy metals accumulate in organisms at lower trophic levels, and biomagnification, where these toxins become more concentrated at higher trophic levels. This understanding is vital for monitoring ecosystem health and taking corrective actions to protect apex consumers.
• However, statement 3 is incorrect — ecological pyramids do not directly help identify invasive species, as these models do not distinguish between native and non-native species.
• Question 3 of 5 3. Question Birds Following Army Ants is an example for which of the following types of symbiotic relationship between organisms? a) Competition b) Parasitism c) Commensalism d) Mutualism Correct Solution: C Commensalism is a type of symbiotic relationship between organisms in which one organism benefits without harming the other. Many birds form a commensal relationship with some species of ants like the army ants. A great number of army ants trail on the forest floor, and while moving, stir up many insects lying in their path. The birds follow these army ants and eat up the insects that try to escape from them. The birds benefit by catching their prey easily, while the army ants are totally unaffected. Incorrect Solution: C Commensalism is a type of symbiotic relationship between organisms in which one organism benefits without harming the other. Many birds form a commensal relationship with some species of ants like the army ants. A great number of army ants trail on the forest floor, and while moving, stir up many insects lying in their path. The birds follow these army ants and eat up the insects that try to escape from them. The birds benefit by catching their prey easily, while the army ants are totally unaffected.
#### 3. Question
Birds Following Army Ants is an example for which of the following types of symbiotic relationship between organisms?
• a) Competition
• b) Parasitism
• c) Commensalism
• d) Mutualism
Solution: C
Commensalism is a type of symbiotic relationship between organisms in which one organism benefits without harming the other.
Many birds form a commensal relationship with some species of ants like the army ants. A great number of army ants trail on the forest floor, and while moving, stir up many insects lying in their path. The birds follow these army ants and eat up the insects that try to escape from them. The birds benefit by catching their prey easily, while the army ants are totally unaffected.
Solution: C
Commensalism is a type of symbiotic relationship between organisms in which one organism benefits without harming the other.
Many birds form a commensal relationship with some species of ants like the army ants. A great number of army ants trail on the forest floor, and while moving, stir up many insects lying in their path. The birds follow these army ants and eat up the insects that try to escape from them. The birds benefit by catching their prey easily, while the army ants are totally unaffected.
• Question 4 of 5 4. Question What are the sources that add nitrogen oxides into the atmosphere? Bacteria living in soil Reaction of Ultraviolet radiation with ozone Lightning stroke Select the correct answer code a) 2, 3 b) 1, 3 c) 1, 2 d) 1, 2, 3 Correct Solution: B Nitrous oxide emissions occur naturally through many sources associated with the nitrogen cycle, which is the natural circulation of nitrogen among the atmosphere, plants, animals, and microorganisms that live in soil and water. Nitrous oxide is actually removed from the atmosphere when it is absorbed by certain types of bacteria or destroyed by ultraviolet radiation or chemical reactions. A natural source of nitrogen oxides occurs from a lightning stroke. The very high temperature in the vicinity of a lightning bolt causes the gases oxygen and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide. Incorrect Solution: B Nitrous oxide emissions occur naturally through many sources associated with the nitrogen cycle, which is the natural circulation of nitrogen among the atmosphere, plants, animals, and microorganisms that live in soil and water. Nitrous oxide is actually removed from the atmosphere when it is absorbed by certain types of bacteria or destroyed by ultraviolet radiation or chemical reactions. A natural source of nitrogen oxides occurs from a lightning stroke. The very high temperature in the vicinity of a lightning bolt causes the gases oxygen and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide.
#### 4. Question
What are the sources that add nitrogen oxides into the atmosphere?
• Bacteria living in soil
• Reaction of Ultraviolet radiation with ozone
• Lightning stroke
Select the correct answer code
• d) 1, 2, 3
Solution: B
Nitrous oxide emissions occur naturally through many sources associated with the nitrogen cycle, which is the natural circulation of nitrogen among the atmosphere, plants, animals, and microorganisms that live in soil and water.
Nitrous oxide is actually removed from the atmosphere when it is absorbed by certain types of bacteria or destroyed by ultraviolet radiation or chemical reactions.
A natural source of nitrogen oxides occurs from a lightning stroke. The very high temperature in the vicinity of a lightning bolt causes the gases oxygen and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide.
Solution: B
Nitrous oxide emissions occur naturally through many sources associated with the nitrogen cycle, which is the natural circulation of nitrogen among the atmosphere, plants, animals, and microorganisms that live in soil and water.
Nitrous oxide is actually removed from the atmosphere when it is absorbed by certain types of bacteria or destroyed by ultraviolet radiation or chemical reactions.
A natural source of nitrogen oxides occurs from a lightning stroke. The very high temperature in the vicinity of a lightning bolt causes the gases oxygen and nitrogen in the air to react to form nitric oxide. The nitric oxide very quickly reacts with more oxygen to form nitrogen dioxide.
• Question 5 of 5 5. Question Consider the following statements about life forms. Epiphytic: plants which derive nutrients from fungi that are attached to the roots of a vascular plant Terrestrial: plants growing on land and climbers Mycoheterotrophic: plants growing on another plants How many of the above are correctly matched? (a) Only one (b) Only two (c) All three (d) None Correct Solution: A Only option 2 is correct. Epiphytic (plants growing on other plants including those growing on rock boulders and often termed lithophyte), Terrestrial (plants growing on land and climbers) Mycoheterotrophic (plants which derive nutrients from mycorrhizal fungi that are attached to the roots of a vascular plant). Incorrect Solution: A Only option 2 is correct. Epiphytic (plants growing on other plants including those growing on rock boulders and often termed lithophyte), Terrestrial (plants growing on land and climbers) Mycoheterotrophic (plants which derive nutrients from mycorrhizal fungi that are attached to the roots of a vascular plant).
#### 5. Question
Consider the following statements about life forms.
• Epiphytic: plants which derive nutrients from fungi that are attached to the roots of a vascular plant
• Terrestrial: plants growing on land and climbers
• Mycoheterotrophic: plants growing on another plants
How many of the above are correctly matched?
• (a) Only one
• (b) Only two
• (c) All three
Solution: A
Only option 2 is correct.
Epiphytic (plants growing on other plants including those growing on rock boulders and often termed lithophyte),
Terrestrial (plants growing on land and climbers)
Mycoheterotrophic (plants which derive nutrients from mycorrhizal fungi that are attached to the roots of a vascular plant).
Solution: A
Only option 2 is correct.
Epiphytic (plants growing on other plants including those growing on rock boulders and often termed lithophyte),
Terrestrial (plants growing on land and climbers)
Mycoheterotrophic (plants which derive nutrients from mycorrhizal fungi that are attached to the roots of a vascular plant).
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