Explanation

• Plants need gas exchange for photosynthesis and respiration.
• Exchange of CO₂, O₂, and water vapor occurs through stomata on leaves.
• Stomata are tiny pores controlled by guard cells.

Additional information:

• Helps maintain internal water balance and gas diffusion.
• Essential for growth, energy production, and transpiration.

Last verified on 22-01-2026

Explanation

• Hanna Lake is located near Quetta city (Balochistan, Pakistan).
• It is about 10 km away from Quetta in Urak Valley.
• The lake was built in 1894 during British rule.
• It is a famous tourist spot in Pakistan.
• It covers an area of about 27 acres.

Last verified on 06-06-2026

Explanation

Explanation

• Seismology is the study of earthquakes and seismic waves that move through and around the Earth.
• A seismologist is a scientist who studies earthquakes and seismic waves.

Last verified on 03-04-2026

Explanation

• Cholera is an infectious disease caused by the bacterium Vibrio cholerae.
• Symptoms include severe diarrhea, dehydration, and vomiting.
• Cholera can be prevented by clean drinking water and proper sanitation.

• It mainly spreads through contaminated water and food.
  It is most common in areas with poor hygiene and overcrowding.

Last verified on 3-03-2026

Explanation

Explanation

• The Leaning Tower of Pisa is in Pisa, Italy.
• Located in the Piazza del Duomo (Square of Miracles).

Additional information:

• The height of the tower is 55.86 metres (183 feet 3 inches).
• Construction started: August 9, 1173
• Architect: Bonanno Pisano
• Floors: 8
• Completed: 1372

Last verified on 09-03-2026

Explanation

• Shallow means اتلی
• Deep means گہری

Last verified on 09-02-2026

Explanation

Autobiography: In the Line of Fire by Pervez Musharraf

Published: September 25, 2006

Additional information:

• Born: 11 August 1943, Delhi, British India
• Position: 10th President of Pakistan (2001–2008)

Explanation

Insulin is produced by the pancreas, which is an organ located behind the stomach.

The pancreas contains clusters of cells called the Islets of Langerhans, specifically the beta cells within these islets, which are responsible for producing insulin.

Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into cells for energy production or storage.

When blood sugar levels rise after a meal, the pancreas releases insulin to help lower blood sugar levels by promoting the uptake of glucose into cells.