Explanation

• In maize (Zea mays), the first structure to emerge from the seed during germination is the radical root.
• It is also known as the primary root.
• This root grows downward into the soil, anchoring the seedling and absorbing water and nutrients.

Last verified on 01-02-2026

Explanation

• Brassica juncea is the scientific name of Indian mustard, a major oilseed crop.
• Cultivated for edible oil, seeds, and sometimes as a green manure crop.

Additional information:

• B. napus – Canola/Rapeseed
• B. oleracea – Cabbage, Cauliflower

Last verified on 01-02-2026

Explanation

• Hydrophytes are plants adapted to grow in water-rich environments such as ponds, lakes, and marshes.
• Examples: Water lily, Lotus, Hydrilla, and Rice (partially submerged).

Additional information:

• Plants that demand low water are called Xerophytes.

Last verified on 01-02-2026

Explanation

• A wind vane (also called a weather vane) shows the direction from which the wind is blowing.
  • Usually installed on rooftops or meteorological stations.
  • Works with a rotating pointer that aligns with the wind direction.

Last verified on 01-02-2026

Explanation

• Cotton (Gossypium spp.) belongs to the Malvaceae family.
• This family also includes okra (bhindi), hibiscus, and cacao.
• Plants usually have showy flowers and mucilaginous tissues.

Last verified on 01-02-2026

Explanation

• Wheat (Triticum aestivum) belongs to the Poaceae (Gramineae) family — the grass family.
• This family includes major cereals like wheat, rice, maize, barley, sorghum.
• Members have narrow leaves, hollow stems, and fibrous roots.

Last verified on 01-02-2026

Explanation

• Imbibition is the process where seeds absorb water, swell, and become metabolically active.
• It is the first step in seed germination.
• Occurs due to osmosis and capillary action.

Explanation

• Horticulture means پھول، جڑی بوٹیاں، پھل اور سبزیاں کاشت کرنے کا علم
• Horticulture is the agriculture of plants.
  
  
  
  Additional information:
  • Agrostology: Study of grasses 
  • Agronomy: Soil management and crop production 
  • Odontology: Study of teeth 
  • Arthrology: Study of joints 
  • Nephrology: Study of kidneys
  • Hematology: Study of blood  
  • Dermatology: Study of skin

Last verified on 30-01-2026

Explanation

• A hydrometer is an instrument used to measure the specific gravity of liquids.
• It works based on the principle of buoyancy.
• It is widely used to test milk, alcohol, and battery acid.
• Commonly used in laboratories and industries.

Last verified on 30-01-2026

Explanation

• Urea fertilizer contains 46% nitrogen (N).
• Urea is a white crystalline solid.
• It is widely used as a fertilizer and animal feed additive.

Last verified on 31-01-2026