VK IAS- prelims (UPSC highlights)

VK IAS- prelims (UPSC highlights)

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Updated: May 4, 2026 at 11:02 PM

VK IAS- prelims (UPSC highlights)

Prelims info from newspaper articles will be posted here as summary McQ : @Quizhighlights Contact : @Vk_IAS for details about mentorship programs

@upschighlights is a growing community focused on articles and here and related topics

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VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#Environment

✅Altitudinal Migration in birds

🅾️Bird migration = energy optimisation - its not due to temperature

🅾️Species distribution is a function of resource availability.

🅾️Survival = Energy gained ≥ Energy spent- So Birds move to locations where net energy gain is maximum.

⚠️VK IAS subject wise channels - https://t.me/addlist

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VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#Economy

✅CPI TREND

🅾️Note : In India, precious metals like gold and silver occupy a unique and often misunderstood position in the Consumer Price Index (CPI). Unlike most Western economies that treat gold purely as an investment (and thus exclude it from inflation tracking), India classifies them as "consumption goods" because of their deep-rooted cultural and social role.

🅾️The basket now specifically tracks "Gold/Diamond/Platinum Jewellery" as a single item, reflecting modern consumption beyond just plain gold-Specifically under Personal Care and Effects.

⚠️Note that the weight of Gold has been slightly reduced,but the weight of Silver has nearly tripled in the new basket.

🌟Since precious metals are in the "Miscellaneous" group, they are retained in the Core basket- Global gold prices are driven by international wars, US Fed rates, and central bank buying—none of which reflect the "internal" demand of the Indian economy.

⚠️VK IAS subject wise channels - https://t.me/addlist

VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#Environment

✅Rice whales

🅾️What?- Rice’s Whale is native to the Gulf of Mexico- Threatened because of US plan-Oil and gas drilling for energy security- Rice’s Whale (fewer than 100 left)

🅾️Issue?- "They dive to the gulf floor for fatty fish... then rest close to the surface at night-highly susceptible to vessel strikes (being hit by ships)-: If drilling affects the "silver-rag driftfish," the whale cannot simply "switch" its diet, leading to starvation.

⚠️Ecological Role of Whales-Ecosystem Engineers.

⚜️1. The Whale Pump: Whales feed deep in the ocean and defecate near the surface-iron-rich waste acts as a fertilizer for Phytoplankton

⚜️2. Carbon Sequestration: A whale accumulates carbon in its body throughout its long life. When it dies and sinks (called a "Whale Fall"), it locks that carbon away on the ocean floor for centuries.

⚜️3. Food Web Support: A single whale carcass can support a deep-sea ecosystem of scavengers and bacteria for decades.

⚠️VK IAS subject wise channels - https://t.me/addlist

VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#SnT

✅photobiocatalysis

📌Chemical production (drugs, plastics, fuels) is Slow, Energy-intensive, Hard to control precisely

📌Living systems already solve this: Microbes = self-running chemical factories+ Enzymes = highly efficient catalysts

🚫But Enzyme reactions run continuously-They cant be controlled easily. Here, you can use light- Instant ON/OFF switch-Precisely tunable (intensity, wavelength)- Can control Enzymes.

⚜️It gives us the ability to produce-Drugs, Chemicals, Bioplastics With higher efficiency- Here E. coli = platform organism- It is Easy to modify.

So this is about turning microbes into switch-controlled chemical factories.

⚠️VK IAS subject wise channels - https://t.me/addlist

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VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#Art_and_Culture #History
🔴GS1- Art and culture
🔴GS1- History

✅Ancient India - terms in NCERTs/Tamilnadu SCERT


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VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#Environment

✅Chinese Jhalar

⚜️Species: Salvinia molesta
⚜️Origin: Brazil, Argentina → spread via aquarium/horticulture trade- Warm climate + nutrient-rich water = invasive explosion
⚜️India entry: 1955 (Kerala), declared pest by 1964

🔰Forms dense floating mats → blocks sunlight-This Leads to:
⚜️Collapse of aquatic food chain
⚜️Oxygen depletion → fish mortality
⚜️Loss of native flora (lotus decay)
⚜️Converts water body → biologically dead zone

🅾️Solution=Agent: Cyrtobagous salviniae
⚜️Mechanism- Feeds on Salvinia → destroys growth buds

📌Impact- Invasive species control + ecological restoration + livelihood resilience

⚠️VK IAS subject wise channels - https://t.me/addlist

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VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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✅GS-3 : Agri Storage and marketing- What is MSP?- https://t.me/economyhighlights

🅾️UPSC tests MSP's application- i.e. its uneven, crop-specific, and conditional execution in real markets.

📌MSP for cotton is a price floor announced by the Government of India to protect farmers when market prices crash. It is operationalised through procurement. It is announced annually on recommendation of Commission for Agricultural Costs and Prices , then approved by Cabinet, next Implemented mainly via Cotton corporation of India-MSP is not always active procurement

⚠️Note : It becomes active only when market price < MSP- Similarly unlike rice and wheat-Procurement is mainly for price stabilisation, not PDS that too Indirect support through market intervention not DBT.

So - MSP procurement = market correction tool- Not same as: PM-KISAN (income support)

⚠️VK IAS subject wise channels - https://t.me/addlist

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VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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✅Gs-3 : Environment

🅾️You can get a prelims question like this- Which of the following traits are exhibited by Elephants/Apes?

⚜️Intentional Communication: It is not unique to humans. Animals adjust their "message" based on the recipient's attention or knowledge.

⚜️Ape Intelligence (Orangutans): They use goal-directed gestures and will change to a different gesture if the first one isn't understood.

🔰Elephant Social/Cognitive Skills: elephant "trumpet calls" are distinct depending on whether they are addressing other elephants or human mahouts- helps in dealing Man-Animal Conflict.

⚜️Mourning: They stand guard over the dead and cover bodies with branches.

⚜️They can recognize ..even after years using ear flapping/trunk swinging

⚜️They use eye contact for some gestures but can communicate via "tail touching" when eye contact isn't possible.

🌟Honeybees: The "waggle dance" is also discussed here- PYQ!

⚠️VK IAS subject wise channels - https://t.me/addlist

🎖 https://www.youtube.com/vikas_kanukollu?sub_confirmation=1

VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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✅Gs-3 : Conservation -Amphibians

⚠️PROBLEM?-Amphibians are facing ecological collapse
✅Frogs control insect populations👉 Decline leads to: Pest explosion+ Crop damage+ Ecosystem imbalance

🅾️Loss of amphibians = systemic ecological stress-Frogs live in both aquatic and terrestrial systems-Highly sensitive to environmental change

🅾️Climate change causes false early monsoon signals and Prolonged dry spells-Leads to failed breeding cycles

🅾️Invasive pathogens create Disease-driven extinction-Fungal disease: chytridiomycosis-Attacks skin → disrupts respiration & ion balance-This is one of the largest disease-driven biodiversity collapses globally

🅾️Land-use change-Wetlands, streams, forests degraded=Habitat fragmentation-Frogs lose breeding grounds

🅾️Wildlife protection framework Only a small fraction protected under WPA 1972- Legal frameworks are species-selective-not ecosystem-centric

🎖Join - https://t.me/ecologyhighlights for high value environment articles

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5,910

VK IAS- prelims (UPSC highlights)

Apr 27, 2026, 07:49 AM

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#IR

✅Gs-2 : IR- Maritime Labour Convention (MLC)- Flag of Convenience (FOC)

🅾️The Maritime Labour Convention (MLC) is an International Labour Organization convention. It was established in 2006.

🅾️It was introduced in recognition that the global nature of the shipping industry means that seafarers need special protection, especially since you can be exempted from national labour laws.

🅾️The Directorate General of Shipping (DGS) is the main office in India that looks after sailors.

🅾️It falls under the Ministry of Ports, Shipping, and Waterways.

🅾️The Maritime Labour Convention (MLC) is supposed to protect sailors, but "Flag of Convenience" ships often find ways to ignore it.

⚠️Gs2-IR/PSIR channel link : https://t.me/UPSC_PSIR_IR

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VK IAS- prelims (UPSC highlights)

Apr 20, 2026, 02:22 PM

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#Placesinnews #Geography

✅Durand line

🅾️1893 boundary between British India and Afghanistan -It was not an ethnic boundary. Hence One ethnic community was split across two sovereign states- same pattern you can find even in the case of Africa
• Divides Pashtun tribal regions
• Not formally recognised by successive Afghan regimes-Why?- Argument that the agreement was with British India, not Pakistan and Claim that Pashtun self determination was ignored

📌Geographical location- Durand Line runs across :
• Khyber Pakhtunkhwa
• Balochistan
• Eastern Afghanistan- Pashtun majority regions in Pakistan’s Khyber Pakhtunkhwa and former FATA and -Tribal agencies like North Waziristan, South Waziristan, Kurram, Bajaur

⚠️Now in the map, check the pashtun population spread- This ethnic continuity explains why instability along the Durand Line is never just territorial but also tribal, ideological and strategic all at once.

🔰Join : https://t.me/Geohighlights- for Geography news

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