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All questions of Ecology for BPSC (Bihar) Exam
Consider the following statements:
1. Population is a group of organisms occupying a defined area during a specific time.
2. Population growth rate is the percentage variation between the number of individuals in a population at two different places.
3. The main factors that make the population decrease are death and emigration.
Which of these statements is/are correct?
- a)1 and 2 Only
- b)2 and 3 Only
- c)1 Only
- d)1 and 3 Only
Correct answer is option 'D'. Can you explain this answer?
Consider the following statements:
1. Population is a group of organisms occupying a defined area during a specific time.
2. Population growth rate is the percentage variation between the number of individuals in a population at two different places.
3. The main factors that make the population decrease are death and emigration.
Which of these statements is/are correct?
a)
1 and 2 Only
b)
2 and 3 Only
c)
1 Only
d)
1 and 3 Only
|
Kavita Shah answered |
1 and 3 Only. Population is a group of organisms occupying a defined area during a specific time.
The main factors that make the population decrease are death and emigration.
Which biome is characterized by being the most productive agricultural areas of the earth, with trees like beech, oak, maple, and cherry in its flora?- a)Tundra
- b)Taiga
- c)Temperate Deciduous Forest
- d)Tropical rainforest
Correct answer is option 'C'. Can you explain this answer?
Which biome is characterized by being the most productive agricultural areas of the earth, with trees like beech, oak, maple, and cherry in its flora?
a)
Tundra
b)
Taiga
c)
Temperate Deciduous Forest
d)
Tropical rainforest
|
Tarun Mukherjee answered |
Temperate Deciduous Forest
The biome characterized by being the most productive agricultural areas of the earth, with trees like beech, oak, maple, and cherry in its flora, is the Temperate Deciduous Forest.
Characteristics of Temperate Deciduous Forest:
- This biome is found in regions with moderate climate and four distinct seasons.
- It is known for its rich soil, making it highly productive for agriculture.
- The flora includes a variety of deciduous trees such as beech, oak, maple, and cherry.
- These forests experience cold winters and warm summers, with a significant amount of rainfall throughout the year.
- The trees in this biome shed their leaves in the fall and regrow them in the spring, adapting to the changing seasons.
Importance of Temperate Deciduous Forest:
- These forests provide habitat for a diverse range of plant and animal species.
- They play a crucial role in regulating the climate by absorbing carbon dioxide and releasing oxygen through photosynthesis.
- The rich soil supports agriculture, making it one of the most productive areas for farming on Earth.
- These forests are also important for recreational activities, biodiversity conservation, and aesthetic value.
In conclusion, the Temperate Deciduous Forest biome stands out as the most productive agricultural areas on Earth, with its diverse flora and favorable climate conditions supporting abundant plant growth and agriculture.
The biome characterized by being the most productive agricultural areas of the earth, with trees like beech, oak, maple, and cherry in its flora, is the Temperate Deciduous Forest.
Characteristics of Temperate Deciduous Forest:
- This biome is found in regions with moderate climate and four distinct seasons.
- It is known for its rich soil, making it highly productive for agriculture.
- The flora includes a variety of deciduous trees such as beech, oak, maple, and cherry.
- These forests experience cold winters and warm summers, with a significant amount of rainfall throughout the year.
- The trees in this biome shed their leaves in the fall and regrow them in the spring, adapting to the changing seasons.
Importance of Temperate Deciduous Forest:
- These forests provide habitat for a diverse range of plant and animal species.
- They play a crucial role in regulating the climate by absorbing carbon dioxide and releasing oxygen through photosynthesis.
- The rich soil supports agriculture, making it one of the most productive areas for farming on Earth.
- These forests are also important for recreational activities, biodiversity conservation, and aesthetic value.
In conclusion, the Temperate Deciduous Forest biome stands out as the most productive agricultural areas on Earth, with its diverse flora and favorable climate conditions supporting abundant plant growth and agriculture.
Consider the following statements:
1. In the case of plants and animals the sun directly supplies the necessary energy.
2. Energy determines the distribution of organisms in the environment.
Which of these statements is/are correct?
- a)1 Only
- b)Both 1 and 2
- c)2 only
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements:
1. In the case of plants and animals the sun directly supplies the necessary energy.
2. Energy determines the distribution of organisms in the environment.
Which of these statements is/are correct?
a)
1 Only
b)
Both 1 and 2
c)
2 only
d)
Neither 1 nor 2
|
Meera Singh answered |
Energy from the sun is essential for the maintenance of life. In the case of plants, the sun directly supplies the necessary energy. Since animals cannot use solar energy directly they obtain it indirectly by eating plants or animals or both. Energy determines the distribution of organisms in the environment.
Consider the following pairs:1. Caraka-Samhita - Classification of animals based on habitat2. Abiotic component - Plants3. Major Community - Relatively independent, large-sized4. Minor Community - Dependent on neighboring communitiesHow many pairs given above are correctly matched?- a)Only one pair
- b)Only two pairs
- c)Only three pairs
- d)All four pairs
Correct answer is option 'C'. Can you explain this answer?
Consider the following pairs:
1. Caraka-Samhita - Classification of animals based on habitat
2. Abiotic component - Plants
3. Major Community - Relatively independent, large-sized
4. Minor Community - Dependent on neighboring communities
How many pairs given above are correctly matched?
a)
Only one pair
b)
Only two pairs
c)
Only three pairs
d)
All four pairs
|
Ayush Das answered |
Understanding the Pairs
The pairs mentioned in the question relate to ecological and biological concepts. Let's analyze each one to determine which are correctly matched.
1. Caraka-Samhita - Classification of animals based on habitat
- The Caraka-Samhita is an ancient Indian text primarily focusing on Ayurvedic medicine.
- It does not classify animals based on habitat but rather deals with medicinal plants and treatments.
- Conclusion: Incorrect match.
2. Abiotic component - Plants
- Abiotic components refer to non-living elements in an ecosystem, such as sunlight, temperature, water, and minerals.
- Plants are biotic components, meaning they are living entities that rely on abiotic factors for growth.
- Conclusion: Incorrect match.
3. Major Community - Relatively independent, large-sized
- A major community, often referred to as a biome, is indeed characterized by its independence and large size.
- This term usually describes extensive ecosystems like forests, grasslands, and deserts, which function autonomously.
- Conclusion: Correct match.
4. Minor Community - Dependent on neighboring communities
- A minor community, or a microhabitat, often relies on the surrounding major communities for resources and support.
- Examples include smaller ecosystems like ponds within a forest that depend on the larger forest ecosystem.
- Conclusion: Correct match.
Final Evaluation
- Correctly matched pairs:
- Major Community - Relatively independent, large-sized
- Minor Community - Dependent on neighboring communities
Thus, out of the four pairs, two pairs are correctly matched. The correct answer is option 'C'.
The pairs mentioned in the question relate to ecological and biological concepts. Let's analyze each one to determine which are correctly matched.
1. Caraka-Samhita - Classification of animals based on habitat
- The Caraka-Samhita is an ancient Indian text primarily focusing on Ayurvedic medicine.
- It does not classify animals based on habitat but rather deals with medicinal plants and treatments.
- Conclusion: Incorrect match.
2. Abiotic component - Plants
- Abiotic components refer to non-living elements in an ecosystem, such as sunlight, temperature, water, and minerals.
- Plants are biotic components, meaning they are living entities that rely on abiotic factors for growth.
- Conclusion: Incorrect match.
3. Major Community - Relatively independent, large-sized
- A major community, often referred to as a biome, is indeed characterized by its independence and large size.
- This term usually describes extensive ecosystems like forests, grasslands, and deserts, which function autonomously.
- Conclusion: Correct match.
4. Minor Community - Dependent on neighboring communities
- A minor community, or a microhabitat, often relies on the surrounding major communities for resources and support.
- Examples include smaller ecosystems like ponds within a forest that depend on the larger forest ecosystem.
- Conclusion: Correct match.
Final Evaluation
- Correctly matched pairs:
- Major Community - Relatively independent, large-sized
- Minor Community - Dependent on neighboring communities
Thus, out of the four pairs, two pairs are correctly matched. The correct answer is option 'C'.
Consider the following pairs:1. Herbivores : Primary consumers2. Wolves : Secondary consumers3. Algae : Primary producers4. Earthworm : Macro consumersHow many pairs given above are correctly matched?- a)Only one pair
- b)Only two pairs
- c)Only three pairs
- d)All four pairs
Correct answer is option 'C'. Can you explain this answer?
Consider the following pairs:
1. Herbivores : Primary consumers
2. Wolves : Secondary consumers
3. Algae : Primary producers
4. Earthworm : Macro consumers
How many pairs given above are correctly matched?
a)
Only one pair
b)
Only two pairs
c)
Only three pairs
d)
All four pairs
|
Rahul Pillai answered |
Understanding the Pairs
In ecology, organisms are classified based on their roles in the food chain. Let’s analyze each pair to determine their correctness.
1. Herbivores : Primary Consumers
- This pair is correctly matched.
- Herbivores, like deer and rabbits, feed on plants and are classified as primary consumers in the food chain.
2. Wolves : Secondary Consumers
- This pair is also correctly matched.
- Wolves are carnivores that prey on herbivores, thus they are considered secondary consumers.
3. Algae : Primary Producers
- This pair is correctly matched as well.
- Algae perform photosynthesis and produce energy, making them primary producers in aquatic ecosystems.
4. Earthworm : Macro Consumers
- This pair is not correctly matched.
- Earthworms are decomposers or detritivores, breaking down organic matter rather than being classified as macro consumers, which typically refers to larger organisms that consume other organisms.
Conclusion
- Out of the four pairs, three are correctly matched:
- Herbivores are primary consumers.
- Wolves are secondary consumers.
- Algae are primary producers.
- Only the earthworm pair is incorrect.
Thus, the correct answer is option 'C': only three pairs are correctly matched.
In ecology, organisms are classified based on their roles in the food chain. Let’s analyze each pair to determine their correctness.
1. Herbivores : Primary Consumers
- This pair is correctly matched.
- Herbivores, like deer and rabbits, feed on plants and are classified as primary consumers in the food chain.
2. Wolves : Secondary Consumers
- This pair is also correctly matched.
- Wolves are carnivores that prey on herbivores, thus they are considered secondary consumers.
3. Algae : Primary Producers
- This pair is correctly matched as well.
- Algae perform photosynthesis and produce energy, making them primary producers in aquatic ecosystems.
4. Earthworm : Macro Consumers
- This pair is not correctly matched.
- Earthworms are decomposers or detritivores, breaking down organic matter rather than being classified as macro consumers, which typically refers to larger organisms that consume other organisms.
Conclusion
- Out of the four pairs, three are correctly matched:
- Herbivores are primary consumers.
- Wolves are secondary consumers.
- Algae are primary producers.
- Only the earthworm pair is incorrect.
Thus, the correct answer is option 'C': only three pairs are correctly matched.
Consider the following statements about the Structure of a community:1. A community may have one or several species.2. The environmental factors determine the characteristic of the community.Which of these statements is/are correct?- a) 1 Only
- b) 2 Only
- c) Both 1 and 2
- d) Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements about the Structure of a community:
1. A community may have one or several species.
2. The environmental factors determine the characteristic of the community.
Which of these statements is/are correct?
a)
1 Only
b)
2 Only
c)
Both 1 and 2
d)
Neither 1 nor 2
|
Partho Goyal answered |
Community Structure
The structure of a community refers to the composition of its species and the interactions among them. The following statements describe the structure of a community:
1. A community may have one or several species: This statement is correct. A community is defined as a group of different populations of species living in a particular area and interacting with each other. A community can have one or several species, depending on the size of the area and the environmental conditions.
2. The environmental factors determine the characteristics of the community: This statement is incorrect. While environmental factors do play a crucial role in shaping the structure of a community, they do not determine all of its characteristics. The interactions among species also play a significant role in determining the characteristics of a community, such as its diversity, stability, and productivity.
Conclusion
In conclusion, statement 1 is correct because a community can have one or several species, depending on the environmental conditions. Statement 2 is incorrect because environmental factors are not the only determinants of community characteristics. The interactions among species also play a crucial role in shaping the structure of a community.
The structure of a community refers to the composition of its species and the interactions among them. The following statements describe the structure of a community:
1. A community may have one or several species: This statement is correct. A community is defined as a group of different populations of species living in a particular area and interacting with each other. A community can have one or several species, depending on the size of the area and the environmental conditions.
2. The environmental factors determine the characteristics of the community: This statement is incorrect. While environmental factors do play a crucial role in shaping the structure of a community, they do not determine all of its characteristics. The interactions among species also play a significant role in determining the characteristics of a community, such as its diversity, stability, and productivity.
Conclusion
In conclusion, statement 1 is correct because a community can have one or several species, depending on the environmental conditions. Statement 2 is incorrect because environmental factors are not the only determinants of community characteristics. The interactions among species also play a crucial role in shaping the structure of a community.
Consider the following statements:Statement-I:
The tropical rain forest covers about 7% of the earth's surface and 40% of the world’s plant and animal species.Statement-II:
Tropical rain forests have multiple stories of broad-leafed evergreen tree species with most animals and epiphytic plants concentrated in the canopy or treetop zones.Which one of the following is correct in respect of the above statements?- a)Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- b)Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
- c)Statement-I is correct, but Statement-II is incorrect
- d)Statement-I is incorrect, but Statement-II is correct
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements:
Statement-I:
The tropical rain forest covers about 7% of the earth's surface and 40% of the world’s plant and animal species.
The tropical rain forest covers about 7% of the earth's surface and 40% of the world’s plant and animal species.
Statement-II:
Tropical rain forests have multiple stories of broad-leafed evergreen tree species with most animals and epiphytic plants concentrated in the canopy or treetop zones.
Tropical rain forests have multiple stories of broad-leafed evergreen tree species with most animals and epiphytic plants concentrated in the canopy or treetop zones.
Which one of the following is correct in respect of the above statements?
a)
Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
b)
Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
c)
Statement-I is correct, but Statement-II is incorrect
d)
Statement-I is incorrect, but Statement-II is correct
|
EduRev UPSC answered |
Statement-I correctly highlights the significant coverage of the earth's surface by tropical rain forests and the proportion of plant and animal species they harbor. Statement-II complements this by describing the unique structure of tropical rain forests with multiple layers of vegetation and the concentration of animals and epiphytes in the canopy. The second statement provides further details supporting the first statement, hence both statements are correct, and Statement-II elaborates on Statement-I, making option A the correct choice.
Consider the following statements regarding one of the major geochemical cycles, the water cycle:
1. Precipitation that falls near the equator is most likely to fall as rain into the ocean.
2. Water vapor is a greenhouse gas that helps to regulate the temperature of the earth's atmosphere.
3. Globally, precipitation far exceeds evaporation.
Which of the above statements is/are correct?
- a)1 and 2 only
- b)2 only
- c)1, 2 and 3
- d)1 and 3 only
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements regarding one of the major geochemical cycles, the water cycle:
1. Precipitation that falls near the equator is most likely to fall as rain into the ocean.
2. Water vapor is a greenhouse gas that helps to regulate the temperature of the earth's atmosphere.
3. Globally, precipitation far exceeds evaporation.
Which of the above statements is/are correct?
a)
1 and 2 only
b)
2 only
c)
1, 2 and 3
d)
1 and 3 only
|
Meera Saha answered |
Statement 1: Precipitation near the equator falls as rain into the ocean.
This statement is correct. Near the equator, the climate is generally warm and humid. As warm, moist air rises, it cools and condenses, forming clouds. These clouds then produce heavy rainfall. Since the equator is surrounded by vast oceans, a significant portion of the precipitation falls directly into the ocean.
Statement 2: Water vapor is a greenhouse gas that helps regulate the temperature of the Earth's atmosphere.
This statement is also correct. Water vapor is the most abundant greenhouse gas in the Earth's atmosphere. It plays a crucial role in regulating the Earth's temperature through the greenhouse effect. Water vapor absorbs and re-emits heat radiated from the Earth's surface, trapping it in the atmosphere. This process helps to maintain the Earth's temperature within a suitable range for supporting life.
Statement 3: Globally, precipitation far exceeds evaporation.
This statement is incorrect. The water cycle involves the continuous movement of water between the Earth's surface, atmosphere, and back. Precipitation refers to the process of water falling from the atmosphere to the Earth's surface, while evaporation refers to the process of water changing from a liquid to a vapor and returning to the atmosphere.
Globally, evaporation and precipitation are generally balanced, forming a cycle. The amount of water evaporating from the Earth's surface is approximately equal to the amount of water returning as precipitation. Therefore, the statement that precipitation far exceeds evaporation is not accurate.
Conclusion:
Based on the analysis, the correct statements are:
1. Precipitation that falls near the equator is most likely to fall as rain into the ocean.
2. Water vapor is a greenhouse gas that helps to regulate the temperature of the Earth's atmosphere.
Consider the following statements:Statement-I: Abiotic components of an ecosystem consist of inorganic and non-living parts like soil, water, air, and light energy, impacting the environment through various physical processes.Statement-II: Biotic components of an ecosystem, such as plants and animals, utilize abiotic factors like soil nutrients and sunlight to grow and reproduce, illustrating how these non-living elements support and sustain life within the ecosystem.Which one of the following is correct in respect of the above statements?- a)Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- b)Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
- c)Statement-I is correct, but Statement-II is incorrect
- d)Statement-I is incorrect, but Statement-II is correct
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements:
Statement-I: Abiotic components of an ecosystem consist of inorganic and non-living parts like soil, water, air, and light energy, impacting the environment through various physical processes.
Statement-II: Biotic components of an ecosystem, such as plants and animals, utilize abiotic factors like soil nutrients and sunlight to grow and reproduce, illustrating how these non-living elements support and sustain life within the ecosystem.
Which one of the following is correct in respect of the above statements?
a)
Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
b)
Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
c)
Statement-I is correct, but Statement-II is incorrect
d)
Statement-I is incorrect, but Statement-II is correct
|
Ias Masters answered |
- Statement-I correctly defines abiotic components as non-living parts like soil, water, air, and light energy that impact ecosystems through physical processes.
- Statement-II correctly explains how biotic components (plants and animals) depend on abiotic factors such as soil nutrients and sunlight for growth and reproduction.
- Both statements are accurate, and Statement-II provides a clear illustration of how abiotic components support life, making it explanatory of Statement-I.
Thus, option A is correct: Both statements are correct, and Statement-II explains Statement-I.
- Statement-II correctly explains how biotic components (plants and animals) depend on abiotic factors such as soil nutrients and sunlight for growth and reproduction.
- Both statements are accurate, and Statement-II provides a clear illustration of how abiotic components support life, making it explanatory of Statement-I.
Thus, option A is correct: Both statements are correct, and Statement-II explains Statement-I.
Chapter doubts & questions for Ecology - Environment & Additional Topics for State PSC Exams 2025 is part of BPSC (Bihar) exam preparation. The chapters have been prepared according to the BPSC (Bihar) exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for BPSC (Bihar) 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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