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Type: Prelims Only

  • [pib] Pest-Control Pheromone Dispenser

    Why in the News?

    A new sustainable pheromone dispenser has been developed through a collaborative research project by scientists from Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) and ICAR–National Bureau of Agricultural Insect Resources (ICAR–NBAIR).

    What is the Pest-Control Pheromone Dispenser?

    Details
    What is it? A device designed to release pheromones that alter the behaviour of pests, primarily used in agriculture to control infestations and prevent crop damage.
    Developed By A collaborative project by scientists from Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru, and ICAR–National Bureau of Agricultural Insect Resources (ICAR–NBAIR), India.
    How it Works
    • Releases synthetic pheromones that mimic natural insect signals.
    • Attracts pests to traps or disrupts mating cycles, preventing infestations.
    Technology
    • Uses mesoporous silica matrix technology for controlled release.
    • Ensures consistent pheromone release, independent of external factors like temperature.
    Benefits
    • Cost-effective: Fewer replacements of pheromones reduce overall costs.
    • Labor-saving: Longer intervals between replacements lower labor requirements.
    • Environmentally friendly: Reduces chemical pesticide use, promoting sustainable agriculture.
    • Increased efficacy: Stable release rate ensures effective pest control over extended periods.
    Scalability Suitable for both small-scale farms and large industrial agricultural operations, making it highly scalable.

     

    PYQ:

    [2018] With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements:

    1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests.

    2. GM mustard has the genes that allow the plant cross-pollination and hybridization.

    3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University.

    Which of the statements given above is/are correct?

    (a) 1 and 3 only

    (b) 2 only

    (c) 2 and 3 only

    (d) 1, 2 and 3

  • Square Kilometer Array (SKA) becomes partially functional

    Why in the News?

    The Square Kilometer Array (SKA), the world’s largest radio telescope, has carried out its first observations, marking a major milestone.

    About Square Kilometer Array (SKA) Project:

    Details
    Project Overview SKA is a global project aimed at building the world’s largest radio telescope network to explore the universe, galaxies, dark matter, and extraterrestrial life.
    Construction Phases Two phases:

    1. SKA-Mid in South Africa operates in higher frequency ranges.
    2. SKA-Low in Australia operates in lower frequency ranges.

    Phase 1 (SKA- Mid) began in December 2022. Full operations expected by 2029.
    Headquarters Jodrell Bank Observatory, UK
    Site Locations Telescope arrays in Australia (low-frequency) and South Africa (mid-frequency).
    Design and Features
    • 197 parabolic radio antennae in South Africa
    • 131,072 low-frequency antennae in Australia

    These are capable of detecting faint radio signals from vast distances.
    Global Consortium 16 member countries, including Australia, South Africa, India, China, Japan, and several European nations.
    India’s Role
    • India’s Giant Metrewave Radio Telescope (NCRA, TIFR) is a key partner
    • SKA India consortium (20+ institutions) involved in software, signal processing, and digital hardware development
    Key Technologies Advanced interferometer system using wave interference for data collection.
    Scientific Objectives
    • Explore galaxies at the edge of the universe
    • Study the ‘Dark Ages’ and phenomena like dark matter and dark energy
    • Search for extraterrestrial life
    Frequency Range Operates between 50 MHz to 15.4 GHz
    Global Collaboration Key collaboration among India, Australia, South Africa, Italy, and other member nations for data generation, analysis, and installation of antennas.

     

    PYQ:

    [2022] Launched on 25th December, 2021, James Webb Space Telescope has been much in the news since then. What are its unique features which make it superior to its predecessor Space Telescopes? What are the key goals of this mission? What potential benefits does it hold for the human race?

    [2015] In the context of modern scientific research, consider the following statements about ‘IceCube’, a particle detector located at South Pole, which was recently in the news:

    1. It is the world’s largest neutrino detector, encompassing a cubic kilometre of ice.

    2. It is a powerful telescope to search for dark matter

    3. It is buried deep in the ice.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3 only

  • White Revolution 2.0

    Why in the News?

    The Ministry of Cooperation unveiled White Revolution 2.0, focusing on empowering women farmers and creating job opportunities in the dairy cooperative sector.

    What is White Revolution 2.0?

    Details
    Objective Transforming India’s dairy sector by empowering women farmers, increasing milk production, and modernizing dairy infrastructure.
    Target  Increase procurement from the current 660 lakh litres per day to 1,000 lakh litres per day.
    Funding • Initial funding of ₹40,000 per Multi-Purpose Primary Agricultural Credit Society (PACS) by National Dairy Development Board.
    • Total outlay of ₹70,125 crore with full government budgetary support.
    Provisions and Features 1. Women Empowerment: Focus on empowering women in the dairy sector and strengthening women’s cooperatives.
    2. Increase in Milk Procurement: Aims to raise procurement by 50% over the next five years.
    3. Cooperative Infrastructure: 100,000 new and existing cooperative societies (district cooperative societies and Primary Agricultural Credit Societies) to be set up or enhanced.
    4. RuPay Kisan Credit Cards: Nationwide rollout for dairy farmers, with micro-ATMs at cooperative societies.
    5. Computerisation of Primary Agricultural Credit Societies: 67,930 Primary Agricultural Credit Societies will be computerised for better management.
    Significance 1. Women Empowerment: Creates leadership opportunities for women in dairy, promoting gender equality.
    2. Boost to Rural Economy: Strengthening cooperatives and milk procurement will improve rural livelihoods.
    3. Improved Infrastructure: Modern technology, micro-ATMs, and computerisation will increase efficiency.
    4. Job Creation: Expanding cooperatives and modern practices will generate jobs for 130 million farmers.
    5. Malnutrition Reduction: Enhances dairy quality to combat malnutrition.
    6. Cooperative Modernisation: Focus on Artificial Intelligence and advanced technologies.
    7. Dairy Exports Boost: Improved production and quality to enhance India’s dairy exports.

     

    PYQ:

    [2017] Explain various types of revolutions, took place in Agriculture after Independence in India. How these revolutions have helped in poverty alleviation and food security in India?

  • Amoebic Meningoencephalitis

    Why in the News?

      • This year, Kerala faced a sudden surge in Amoebic Meningoencephalitis cases, caused by free-living amoebae (FLA) found in freshwater ponds, lakes, and rivers.
    • Kerala also saw a diverse range of amoebic infections, caused by Naegleria fowleri, Vermamoeba vermiforis, and Acanthamoeba.

    What is Primary Amoebic Meningoencephalitis (PAM)?

    • PAM is caused by the Naegleria fowleri, often referred to as the “brain-eating amoeba“. It destroys brain tissue, causing severe swelling and is fatal in most cases.
      • An amoeba is a type of cell or unicellular organism with the ability to alter its shape, primarily by extending and retracting pseudopods.
      • Higher temperatures of up to 115°F (46°C) are conducive to its growth and it can survive for short periods in warm environments.
    • The amoeba enters the body through the nose, typically during activities like swimming, and travels to the brain, causing severe damage.
    • PAM is also non-communicable.
    • Symptoms: Headache, fever, nausea, vomiting, stiff neck, confusion, seizures, hallucinations, and coma.
      • According to the US Centers for Disease Control and Prevention (CDC), most people with PAM die within 1 to 18 days after symptoms begin. It usually leads to coma and death after 5 days.

    Diagnosis and Treatment:

    • Currently, there are no established effective treatments for PAM.
    • Diagnosis involves PCR tests of cerebrospinal fluid, though detection can be challenging due to the rarity of PAM.
    • Treatment follows CDC guidelines, including miltefosine, Azithromycin, and Amphotericin B, with miltefosine recently procured by the State Health Department from Germany.
      • Medical interventions typically involve a combination of drugs, including amphotericin B, azithromycin, fluconazole, rifampin, miltefosine, and dexamethasone.

  • 100 Years of Harappan Civilization

    Why in the News?

    It has been 100 years since the discovery of the Harappan Civilization, announced by John Marshall on September 20, 1924.

    Harappa: Remains of a Civilization

    • The Harappan Civilization, also known as the Indus Valley Civilization, flourished between 2600 BCE and 1900 BCE, with earlier settlements dating back to 3200 BCE.
    • The origins of this civilisation are traced back to Mehrgarh in Balochistan, which dates to 7000 BCE.
    • It is considered one of the three earliest civilizations, alongside Egypt and Mesopotamia.
    • The civilization covered over 1.5 million sq. km, stretching across modern-day India, Pakistan, and Afghanistan.
    • Remains of the civilization include:
      • Well-planned cities with a grid layout, intersecting streets, and fortified structures.
      • Advanced drainage systems with underground sewers and covered drains, showing a strong emphasis on hygiene.
      • Granaries, warehouses, and dockyards, indicating the presence of structured trade and food storage mechanisms.
      • The discovery of seals made of steatite, often engraved with animals and an un-deciphered script, suggesting a sophisticated administrative system.
      • Craftsmanship in pottery, bead-making, terracotta figurines, metal artefacts, and weaving.
      • Water management systems such as reservoirs, wells, and baths, indicating an advanced understanding of hydraulic engineering.

    The Discoverers:

    • Two ASI archaeologists were credited with the discovery:
      • Daya Ram Sahni excavated Harappa in 1921-22, discovering seals, pottery, and beads.
      • Rakhal Das Banerji began excavating Mohenjo-daro in 1922, finding similar items such as seals and copper objects.
    • John Marshall noticed the similarity between the objects found at Harappa and Mohenjo-daro, despite the sites being 640 km apart.

    About the Mohenjo-daro Site:

    • Mohenjo-daro is one of the largest cities of the Harappan Civilization, located in the Sindh province of Pakistan, discovered in 1922 by Rakhal Das Banerji.
    • The city represents one of the finest examples of ancient urban planning:
      • Great Bath: A large, centrally located structure thought to be used for ritual bathing or religious ceremonies. It is considered one of the earliest public water tanks in history.
      • Granaries: Massive storage facilities near the citadel suggest an organized system of storing food for the community.
      • Citadel and Lower Town: The city was divided into a raised citadel for the ruling elite and a lower town for common people. Both areas had well-planned streets and residential complexes.
      • Drainage Systems: Mohenjo-daro featured covered drainage systems with individual toilets connected to the drainage network, showcasing an impressive public sanitation system.
      • Residential Buildings: Homes were built from uniform mud bricks, with courtyards and bathrooms, and were often multi-storied. The use of standardised brick sizes (ratio 1:2:4) and cubic weights showed their high degree of organisation.
    • Artefacts found at Mohenjo-daro include:
      • Seals with animal motifs and the un-deciphered Harappan script, believed to have been used for administrative or trade purposes.
      • Pottery and tools made of bronze and copper.
      • Terracotta figurines, jewellery, and toys that reflect a highly developed artistic culture.
      • Weights and measures based on a uniform standard, indicating the use of a standardized economic system.
    • The city’s streets were aligned north-south and east-west, cutting at right angles, allowing for efficient transportation, including bullock carts.
    • Mohenjo-daro is believed to have had trade links with Mesopotamia, as suggested by artefacts with Mesopotamian connections.

    PYQ:

    [2013] Which of the following characterizes/characterize the people of Indus Valley Civilization?

    1. They possessed great palaces and temples.

    2. They worshipped both male and female deities.

    3. They employed horse-drawn chariots in warfare.

    Select the correct statement/statements using the codes given below.

    (a) 1 and 2 only

    (b) 2 only

    (c) 1, 2 and 3

    (d) None of the statements given above is correct

  • Why Earth will temporarily get a ‘Mini-Moon’ in September?

    Why in the News?

    In a rare celestial event, Earth’s gravitational field will witness a small asteroid, 2024 PT5, creating a “mini-moon” for two months.

    What is Mini-Moon?

    • A mini-moon is a small asteroid temporarily captured by Earth’s gravitational field, orbiting the planet for a short period before escaping back into space.
    • Unlike Earth’s permanent moon, mini-moons only stay for a few months to a few years before being ejected from orbit.
    • Mini-moons are a rare occurrence because most asteroids either pass by Earth or burn up in the atmosphere rather than being captured by Earth’s gravity.
    • Mini-moons are usually small, often just a few meters in diameter.
      • For example, 2024 PT5 is only about 33 feet (10 meters) in length.
    • They are hard to detect and are usually discovered using advanced telescopic surveys like NASA’s Asteroid Terrestrial-impact Last Alert System (ATLAS).

    Significance of Mini-Moons

    • Mini-moons offer scientists a unique opportunity to study near-Earth objects, enhancing our understanding of asteroids’ behavior and composition.
    • Mini-moons could contain valuable minerals or water, making them potential targets for future space missions to extract resources.
    • Studying mini-moons helps scientists learn more about Earth’s gravitational influence and how it interacts with space objects.

    PYQ:

    [2011] What is the difference between asteroids and comets?

    1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material.
    2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury.
    3. Comets show a perceptible glowing tail, while asteroids do not.

    Which of the statements given above is/are correct?

    (a) 1 and 2 only
    (b) 1 and 3 only
    (c) 3 only
    (d) 1, 2 and 3

  • [pib] A poem on ‘National War Memorial’ and a chapter on ‘Veer Abdul Hameed’ included in NCERT

    Why in the News?

    A poem on National War Memorial and a chapter about Veer Abdul Hameed (PVC) introduced by the Ministries of Defence and Education has been included in the NCERT Class VI curriculum.

    About National War Memorial

    • The National War Memorial was unveiled on 25th February 2019 to honor Indian soldiers who sacrificed their lives in conflicts with Pakistan, China, 1961 Goa war and Operation Pawan.
    • The monument is designed in a C-hexagon layout, with names of the fallen soldiers inscribed on its walls.
    • It was designed by Yogesh Chandrasan of WeBe Design Lab.
    • Key features include the Amar Chakra (Circle of Immortality) with the ‘Eternal Flame’ symbolizing the nation’s commitment to remembering the soldiers.
    • The Veerta Chakra showcases six bronze murals depicting acts of bravery.
    • The Rakshak Chakra symbolizes protection with trees representing troops safeguarding the nation.
    • Tyag Chakra (Circle of Sacrifice) features concentric granite walls honoring the soldiers who have died since Independence.
    • The memorial also features busts of 21 soldiers who have received the Param Vir Chakra, India’s highest gallantry award.

    Who was Veer Abdul Hameed?

    • Abdul Hamid was a soldier in the 4th Grenadiers of the Indian Army.
    • He fought in the Battle of Asal Uttar during the 1965 India-Pakistan war, which took place near the India-Pakistan border in Punjab.
    • On 10th September 1965, he destroyed 3 Pakistani tanks and damaged a 4th near Chima village. He was killed during the battle.
    • For his exceptional bravery, he was posthumously awarded the Param Vir Chakra, India’s highest military honour.
    • A war memorial now stands at the site of his death, featuring a captured Pakistani Patton tank as a tribute to his courage.

  • TRISHNA Mission

    Why in the News?

    Philippe Baptiste, head of the French Space Agency, talked about the joint India-France “TRISHNA Mission.”

    TRISHNA Mission:

    Details
    Overview A joint Indo-French Earth observation satellite project developed by ISRO and CNES (French Space Agency).

    Acronym for “Thermal infraRed Imaging Satellite for High-resolution Natural resource Assessment” (TRISHNA Mission)
    Launch Year Targeted for 2026.
    Mission Lifespan Designed for a 5-year operational life.
    Primary Objectives • Monitor water and energy budgets of the continental biosphere.

    • Assess evapotranspiration for efficient water management.

    • Improve agricultural water productivity and assist in irrigation water management.

    • Provide high-resolution observations of water quality in coastal and inland waters. 

    • Assess urban heat islands and detect heat anomalies.
    Payloads • Thermal Infrared (TIR) Payload: Provided by CNES, this sensor maps surface temperature and emissivity in high resolution.

    • Visible-Near Infrared-Short Wave Infrared (VNIR-SWIR) Payload: Developed by ISRO, this sensor uses seven spectral bands for detailed mapping of surface reflectance.
    Orbit and Spatial Resolution • TRISHNA will operate in a sun-synchronous orbit at an altitude of 761 km.

    • Spatial resolution: 57 meters for land and coastal areas, 1 km for ocean and polar regions.
    Application and Significance   • Supports water resource management, agriculture, and urban planning through precise data on water stress, crop productivity, and urban heat islands.
    • Enhances climate resilience by tracking droughts, evapotranspiration, and permafrost changes.
    • Contributes to global environmental initiatives like GEOGLAM and Sustainable Development Goals (SDGs) by providing key agricultural and climate variables.

     

    PYQ:

    [2016] Discuss India’s achievements in the field of Space Science and Technology. How the application of this technology helped India in its socio-economic development?

    [2010] In the context of space technology, what is “Bhuvan”, recently in the news?

    (a) A mini satellite launched by ISRO for promoting the distance education in India

    (b) The name given to the next Moon Impact Probe, for Chandrayaan-II

    (c) A geoportal of ISRO with 3D imaging capabilities of India

    (d) A space telescope developed by India

  • The Volcanic Island of Rapa Nui

    Rapa Nui

    Why in the News?

    The Volcanic Island of Rapa Nui (also known as Easter Island) has always been mysterious due to its harsh geography and iconic Moai statues.

    About Rapa Nui Island

    Details
    Location • Situated in the southeastern Pacific Ocean, Rapa Nui is part of Polynesia and a territory of Chile.
    • One of the most remote islands, about 3,500 km from Chile.
    Size • Covers an area of 160 sq. km.
    Geographical details • The island has a volcanic origin, featuring lava-covered terrain and rocky soil.

    • Notable volcanoes include Terevaka, Poike, and Rano Kau.

    • Tropical climate with average temperatures ranging between 18°C and 28°C.

    • Rainfall occurs mostly in the winter months.
    Moai Statues • Famous for over 900 moai statues, some as tall as 40 ft and weighing 75 tonnes.
    • These statues were built between the 13th and 16th centuries to honor revered ancestors.
    • Carved from volcanic rock and transported across great distances.
    Discovery • Discovered by European sailors on Easter Sunday, 1722, which gave it the name Easter Island.
    • The island had been settled centuries earlier by Polynesian explorers who navigated thousands of kilometers of ocean.
    Significance of New Findings • Recent studies, including the use of AI analysis of satellite images, have debunked earlier theories of ecological collapse.
    • Genetic studies show Native American ancestry before European contact, indicating earlier interactions with South America.

     

    PYQ:

    [2018] Consider the following statements:

    1. The Barren Island volcano is an active volcano located in the Indian territory.

    2. Barren Island lies about 140 km east of Great Nicobar.

    3. The last time the Barren Island volcano erupted was in 1991 and it has remained inactive since then.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 and 3

    (c) 3 only

    (d) 1 and 3

  • Chandrayaan-4, Venus orbiter gets approval from Cabinet

    Why in the News?

    The Union Cabinet approved the expansion of the Chandrayaan-4 mission, Venus Orbiter Mission (Shukrayaan Misison), Gaganyaan, the development of India’s first space station (the Bharatiya Antariksh Station), and NextGen launch vehicles.

    About Chandrayaan-4 Mission

    • Chandrayaan-4 is the fourth mission in India’s Chandrayaan program (2003).
    • The mission is currently under conceptualisation and expected to launch around 2027.
    • Aims: To develop technology for a successful moon landing and ensure a safe return to Earth.
    • The mission will be launched in two phases onboard two LVM3 rockets.
    • It will collect lunar samples for analysis on Earth.

    About Venus Orbiter Mission (VOM)

    • The VOM, also called Shukrayaan-1, is an upcoming ISRO mission targeting a 2028 launch. 
    • The mission aims to study Venus’ surface, atmosphere, volcanic activity, and solar wind interactions with its ionosphere.
    • It will have a mission duration of 4 years.
    • The spacecraft will operate in an elliptical orbit, with distances of 60,000 km at apoapsis and 500 km at periapsis.
    • Its payload has a capacity of 100 kg, is powered by 500 watts, and will feature Indian and international instruments for comprehensive analysis.
    • For the mission’s payload and technology, collaborations with NASA, CNES (France), and Russia have been established.

    PYQ:

    [2016] The Mangalyaan launched by ISRO:

    1. is also called the Mars Orbiter Mission
    2. made India the second country to have a spacecraft orbit the Mars after USA
    3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt

    Which of the statements given above is/are correct?

    (a) 1 only
    (b) 2 and 3 only
    (c) 1 and 3 only
    (d) 1, 2 and 3