NCERT Solutions for Class 11 Sociology Part 2 Chapter 3 MCQ Environment and Society with answer and explanation for 2024-25. Class 11th Sociology Chapter 3 of Part II Understanding Society multiple choice questions and solutions are useful for both CBSE and State board students during the revision.
The impact of construction of dams
[A] Submerged forest
[B] Loss of untamed life habitat
[C] Damages downstream ecosystem
[D] All of the above
Solution:
[D] All of the above
Dam construction could affect the biodiversity of microorganisms, benthos, plankton, fish (including aquatic mammals), botany and birds. Dam construction decreased the water fungal biomass and richness in reservoirs and downstream reaches, but increased the soil microorganisms in downstream lake wetlands.
Class 11 Sociology Part 2 Chapter 3 MCQ Explanation
Q1
The adverse effect of recent agriculture is
[A]. Water pollution
[B]. Soil degradation
[C]. Water logging
[D]. All of the above
Answer: Option B
Explanation:
Agriculture contributes to variety larger of environmental issues that cause environmental degradation including: global climate change, deforestation, biodiversity loss, dead zones, recombinant DNA technology, irrigation problems, pollutants, soil degradation, and waste.
Energy flow is that the flow of energy through living things within an ecosystem. All living organisms are often organized into producers and consumers, and people producers and consumers can further be organized into a organic phenomenon. Each of the degree within the organic phenomenon may be a trophic level.
Which of the subsequent is that the most environmental friendly agricultural practice?
[A]. Using chemical fertilizers
[B]. Using insecticides
[C]. Organic farming
[D]. None of the above
Answer: Option C
Explanation:
The most environmentally friendly practice is Organic farming. This farming represents a technique entailing growing plants and raising animals in a very natural environment.
The ultimate stable community in natural process is
[A] Climax
[B] Pioneer
[C] Sere
[D] Carnivores
Solution:
[A] Climax
This final, stable community is termed as climax community because, unlike communities earlier on within the successional process, it doesn’t change much in composition from year to year succession has reached its climax.
Class 11 Sociology Part 2 Chapter 3 MCQ with Answers
Q5
The burning of fossil fuels releases an outsized amount of
[A]. Nitrogen into air
[B]. Sulphur into air
[C]. CO₂ into air
[D]. Oxygen into air
Answer: Option B
Explanation:
When fossil fuels are burned, they release Sulpher and nitrogen oxides into the atmosphere, which contribute to the formation of smog and air pollution. The foremost common nitrogen-related compounds emitted into the air by human activities are collectively mentioned as nitrogen oxides.
The word springs from the french word environer, which suggests to surround, enclose or encircle. The environment may be defined as surroundings or conditions during which living organisms like plants, animals, and humans live.
Mass of living matter at a trophic level in a locality at any given time is named
[A]. Standing state
[B]. Standing crop
[C]. Humus
[D]. Detritus
Answer: Option B
Explanation:
Mass of living matter at a trophic level in a vicinity at any time is named standing crop. It indicates the entire biomass of an ecosystem. It’s expressed as biomass. it’s the overall dried biomass during a given environment.
Sustainable development means
[A] Meeting present needs without compromising on future needs
[B] Progress of personalities
[C] Balance between human needs and therefore the ability of earth to produce the resources
[D] All of the above
Solution:
[D] All of the above
Sustainable development is development that meets the wants of the current without compromising the power of future generations to satisfy their own needs.
Class 11 Sociology Part 2 Chapter 3 Multiple Choice Questions
Q9
Which of the subsequent isn’t influenced by human activities?
[A]. Destruction of mangroves and wetlands
[B]. Depletion of spring water
[C]. Increased extinction rate of species
[D]. None of the above
Answer: Option D
Explanation:
Since all the above options are tormented by human activities. The above options don’t seem to be influenced by human activities. Thus by considering all the above-given options, the foremost appropriate answer is option D. That is, none of the choices is influenced by human activities.
A bunch of living organisms of the identical kind living within the same place and at the identical time refers to a
[A]. Community
[B]. Species
[C]. Population
[D]. Consumers
Answer: Option C
Explanation:
A population could be a group of living organisms of the identical kind living within the same place at the identical time. All of the plant and animal populations living during a habitat interact and form a community.
Which one amongst the subsequent isn’t a gaseous biogeochemical cycle
[A]. Nitrogen cycle
[B]. Carbon cycle
[C]. Sulphur cycle
[D]. Phosphorus cycle
Answer: Option D
Explanation:
The sedimentary cycles just like the phosphorus cycle, however have their nutrient reserves within the soil, rocks and minerals;elements are released from the rock and deposited within the sea. The phosphorus cycle doesn’t have a gaseous phase.
The species restricted to be present in one region are called
[A]. Edge species
[B]. Endemic species
[C]. Endangered species
[D]. Keystone species
Answer: Option B
Explanation:
Endemic species are plants and animals that exist only in one geographical area. Species will be endemic to large or small areas of the earth: some are endemic to a specific continent, some to a part of a continent, et al to one island.
The second trophic level in an exceedingly lake is
[A] Phytoplankton
[B] Zooplanktons
[C] Fishes
[D] Benthos
Solution:
[B] Zooplanktons
Zooplankton are the animal component of the planktonic community. Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by currents within the ocean, or by currents in seas, lakes or rivers.
Class 11 Sociology Part 2 Chapter 3 Important MCQs
Q13
Which of the ecological pyramid is often upright
[A]. Pyramid of numbers
[B]. Pyramid of biomass
[C]. Pyramid of energy
[D]. All of the above
Answer: Option C
Explanation:
Pyramid of energy is that the only pyramid that may never be inverted and is usually upright. this is often because some amount of energy within the style of heat is usually lost to the environment at every trophic level of the organic phenomenon.
In forests, one tree can support an oversized number of birds thus base showing producers in an exceedingly pyramid of number are going to be narrower than the subsequent slab showing primary consumers. Hence a upright pyramid of number isn’t formed during a forest ecosystem.
During photosynthesis, plants absorb carbonic acid gas (CO₂) and water (H₂O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the greenhouse gas is reduced, meaning it gains electrons. This transforms the water into oxygen and therefore the dioxide into glucose.
During a pyramid of numbers in grassland ecosystems, the most important population is that of
[A] Herbivores
[B] Primary consumers
[C] Secondary consumer
[D] Producers
Solution:
[A] Herbivores
The pyramid of biomass in a very grassland ecosystem is upright. Grasses occupy the bottom with the very best biomass, then followed by herbivores like rabbits, rats, etc. the first consumers are followed by secondary consumers (owl, lizards, snakes, etc.).
Actuality end of any organic phenomenon is that the
[A] Decomposer
[B] Predator
[C] Consumer
[D] Human
Solution:
[A] Decomposer
The true end of any organic phenomenon is Decomposers. The organism that breaks down the dead and decaying matter and carries out the decomposition process by an organism is termed a Decomposer.
If during a population, natality is balanced by mortality, then there’ll be
[A] Decrease in increment
[B] Increase in population growth
[C] Zero population growth
[D] Over population
Solution:
[C] Zero population growth
Zero increase (ZPG) is that the absence of growth within which equal birth and death rates create a stable human population.
