General Knowledge

Boost your exam preparation with the latest General Knowledge MCQs with answers and explanations. Our collection covers current affairs, world geography, history, Pakistan studies, sports, science, technology, and important international organizations. These General Knowledge multiple-choice questions are designed for students, job seekers, and competitive exam aspirants preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and recruitment exams. Practice online with updated General Knowledge MCQs to improve awareness, sharpen memory, and score higher in tests and interviews.

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2101. Vermi-composting is a natural method of

by
A. Producing compost manure
B. Producing worms
C. Managing waste it creates
D. Destroying worms
✅ The correct answer is option A.
Vermicompost (vermi-compost, vermiculture) is the product of the decomposition process using various species of worms, usually red wigglers, white worms, and other earthworms, to create a mixture of decomposing vegetable or food waste, bedding materials, and vermicast.

2102. Ozone Umbrella is located in which layer of atmosphere

by
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Ionosphere
✅ The correct answer is option B.
The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth, although its thickness varies seasonally and geographically.

2104. An example of lotic system

by
A. Pond
B. River
C. Lake
D. Reservoir
✅ The correct answer is option B.
A Lotic Ecosystem has flowing waters. Examples include: creeks, streams, runs, rivers, springs, brooks and channels. A Lentic Ecosystem has still waters. Examples include: ponds, basin marshes, ditches, reservoirs, seeps, lakes, and vernal / ephemeral pools.

2105. What is the most important factor for the success of animal population?

by
A. Natality
B. Adaptability
C. Unlimited food
D. Inter species activity
✅ The correct answer is option B.
The process by which a species becomes fit to its survival in the environment is called adaptability. When the environmental factors change the organism has to adapt to its surrounding by changing its temperature or metabolism over a period of time, Hence adaptability is the result of natural selection.

2106. The slow rate of decomposition of fallen logs in nature is due to their

by
A. poor nitrogen content
B. low moisture content
C. low cellulose content
D. anaerobic environment around them
✅ The correct answer is option B.
The microorganisms breakdown the complex compounds of dead protoplasm of producers and consumers absorb some of the decomposition products and release simple substances. The slow rate of decomposition of fallen logs in nature is due to their low moisture content The cellulose is in high amount in fallen logs.

2107. Dodo is

by
A. Endangered
B. Critically endangered
C. Rare
D. Extinct
✅ The correct answer is option D.
The dodo (Raphus cucullatus) is an extinct flightless bird that was endemic to the island of Mauritius, east of Madagascar in the Indian Ocean. The dodo’s closest genetic relative was the also-extinct Rodrigues solitaire, the two forming the subfamily Raphinae of the family of pigeons and doves.

2108. Eutrophication results from

by
A. Agricultural and sewage water
B. Vehicle exhaust
C. Pesticides
D. Industrial effluents
✅ The correct answer is option A.
Eutrophication most commonly arises from the oversupply of nutrients, most commonly as nitrogen or phosphorus, which leads to overgrowth of plants and algae in aquatic ecosystems. After such organisms die, bacterial degradation of their biomass results in oxygen consumption, thereby creating the state of hypoxia.