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

Major Kharif Crops

1. Rice
2. Sugarcane
3. Cotton
4. Maize
5. Bajra
6. Jowar

• Start: April – June
• End: September – October

• Sowing: October – December
• Harvesting: March – May

Last verified on 27-01-2026

Explanation

• Metals allow electricity to pass through them easily.
• Among all metals, silver has the highest electrical conductivity.
• Copper and gold are also very good conductors.
• Silver is widely used in high-precision electrical applications.
• Copper is commonly used in wiring due to cost-effectiveness.

Last verified on 16-05-2026

Explanation

• Vitamin A deficiency → Night blindness (Nyctalopia)
• Vitamin A is important for vision and immune function.

Additional information:

• Vitamin K is essential for blood clotting.
• Vitamin D helps in calcium absorption and bone mineralization.
• Vitamin B1 supports nerve function and energy metabolism.

Last verified on 01-02-2026

Explanation

• The Treaty of Versailles was a peace treaty signed on 28 June 1919.
• Exactly five years after the assassination of Archduke Franz Ferdinand
• Ended  World War I Between Germany and the Allied Powers.
• Location: Hall of Mirrors in the Palace of Versailles, France
• Effective: 10 January 1920
• Languages: French and English

Last updated by NA on 27 April 2026

Explanation

Explanation

World Water Day is observed every year on 22 March.

Additional information:

• First Observed: 22 March 1993
• Organized by: United Nations (UN)
• Theme 2021: 'Valuing Water'
• Theme 2022: "Groundwater, making the invisible visible".
• Theme 2023: Accelerating Change
• Theme 2024: Leveraging Water for Peace
• Theme 2025: Glacier Preservation
• Theme 2026: Water and Gender: Where water flows, equality grows 

Explanation

• Chlorophyll is the green pigment responsible for photosynthesis in plants.
• It captures sunlight and converts it into chemical energy to make food.

• Plants use chlorophyll to produce glucose and oxygen through photosynthesis.
• Chloroplasts contain chlorophyll a and b, which absorb sunlight.

Last verified on 22-01-2026

Explanation

• In MS-Word 2016, a subscript is a number or letter written slightly below the normal text.
• Commonly used in chemical formulas, mathematical expressions, and scientific writing.
• Example: H₂O → the “2” is a subscript.

Additional information:

• Superscript: Written above the normal text (e.g., x²)

Last verified on 19-01-2026

Explanation

• The genetic material (DNA) of an organism can undergo changes called mutations due to environmental factors.
• Examples of environmental factors: radiation, chemicals, UV light.
• Such changes can lead to variation in traits and sometimes evolution.

Last verified on 11-02-2026