Explanation

• The retina is the light-sensitive layer located at the back of the human eye.
• It contains special cells called rods and cones that detect light and color.
• These cells convert light into electrical signals.
• The signals are then sent to the brain through the optic nerve to produce vision.

Last verified on 11-03-2026

Explanation

• In 1979, the Soviet Union (USSR) invaded Afghanistan, marking a major event in the Cold War.
• The invasion aimed to support the communist government in Kabul against insurgent groups.

Additional information:

• Duration of Soviet occupation: 1979–1989 (10 years)
• Afghan resistance groups: Mujahideen fighters
• U.S. support to Mujahideen: military aid, weapons, and training
• Casualties: ~1–2 million Afghan civilians and combatants

Last verified on 12-03-2026

Explanation

• Shahrah-e-Resham (Karakoram Highway) connects Pakistan and China through Khunjerab Pass.
• It is the highest paved international road in the world.
• It links Hassan Abdal (Pakistan) with Kashgar (China).
• It passes through the Karakoram mountain range.
• It is a symbol of strong Pakistan–China friendship.

Additional information:

• The highway is also known as the Karakoram Highway (N-35).
• It was completed in 1979.
• Its total length is about 1,300 km.
• It is often called the “Eighth Wonder of the World” due to its difficult terrain.

Last verified on 17-05-2026

Explanation

• Location: Kaghan Valley, Naran area
• District: Mansehra
• Province: Khyber Pakhtunkhwa (KPK)
• Distance from Naran: ~9 km north
• Nearby peak: Malika Parbat (highest in Kaghan Valley)

Last verified on 03-04-2026

Explanation

• The Indus Waters Treaty was signed on September 19, 1960, in Karachi.
• It was signed between Pakistan (President Ayub Khan) and India (Prime Minister Jawaharlal Nehru).
• It was brokered by the World Bank.

It became effective on April 1, 1960.

• Western Rivers (given to Pakistan): Indus, Jhelum, Chenab
• Eastern Rivers (given to India): Ravi, Beas, Sutlej

Last verified on 30-03-2026

Explanation

• Consciousness means شعور

Last verified on 11-06-2026

Explanation

• Mohenjo-Daro is located in the Larkana district of Sindh.
• Mohenjo Daro means Mound of the Dead.
• It was discovered in 1922 by R. D. Banerji.
• It is a 4000-year-old city of the Indus Civilization.
• It was built around 2500 BC.

Last verified on 11-06-2026

Explanation

 Global Day of Parents is observed on first June every year.

This day was Established by the UN General Assembly in 2012. 

Theme 2026: Together for Parents

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Explanation

• Photosynthesis produces glucose and oxygen.
• Green plants use sunlight, water, and carbon dioxide.
• This process occurs in chloroplasts using chlorophyll.
• Glucose is used as food for energy and growth.
• Oxygen is released as a byproduct into the atmosphere.

Last verified on 10-03-2026

Explanation

det(A) ≠ 0 → Non-singular / Invertible matrix. Has an inverse A⁻¹

det(A) = 0 → Singular / Non-invertible matrix. No inverse exists

Diagonal and Identity matrices can have det = 0 only if they have a zero on diagonal. But "det = 0" by itself defines "Singular".

So rows/columns are linearly dependent - the matrix "collapses" space.

Last verified on 08-06-2026