Explanation

• Ribosomes are known as the "protein factories" of the cell.
• They assemble amino acids into proteins according to mRNA instructions.

Last verified on 12-02-2026

Explanation

• A nullisomic individual lacks both chromosomes of one homologous pair.
• Therefore its chromosome number is 2n − 2.
• It is a type of aneuploidy.

Additional information:

• Monosomic — 2n − 1
• Trisomic — 2n + 1
• Tetrasomic — 2n + 2
• Euploid — normal 2n

Last verified on 12-02-2026

Explanation

• Heritability measures how much of trait variation is due to genetics.
• Narrow-sense heritability = Additive genetic variance / Phenotypic variance.
• It shows how well a trait can be passed from parents to offspring.
• Important in plant and animal breeding.
• Helps predict response to selection.

Last verified on 12-02-2026

Explanation

• Kajli is a well-known sheep breed of Pakistan.
• Famous for its high-quality wool and meat.
• Primarily found in Punjab and Sindh regions.
• Adapted to local climatic conditions.
• Important for livestock economy and farmers’ income.

Last verified on 12-02-2026

Explanation

• Soil texture refers to the relative proportion of sand, silt, and clay particles in soil.
• Determines water retention, aeration, and fertility of soil.
• Soil structure is about arrangement of soil particles.
• Important for agriculture and land management.

Last verified on 12-02-2026

Explanation

• Delta of water refers to the total water required to produce one unit of crop yield.
• For wheat, it is about 16 acre-inches per acre.
• Ensures optimal growth and maximum yield.
• Depends on soil type, climate, and irrigation method.
• Important for efficient water management in agriculture.

Last verified on 12-02-2026

Explanation

• In plants, assimilates (products of photosynthesis) are transported from leaves to other parts.
• Mainly transported in the form of sucrose, a disaccharide sugar.
• Sucrose is soluble and easily moves through phloem tissue.
• Provides energy for growth, storage, and metabolism.
• Essential for fruit, seed, and root development.

Last verified on 12-02-2026

Explanation

• CIMMYT stands for International Maize and Wheat Improvement Center.
• It is a global agricultural research organization.

Additional information:

• Headquarters: El Batán, Mexico
• Founded: 1966

Last verified on 25-01-2026

Explanation

• CLCV stands for Cotton Leaf Curl Virus.
• It is a viral disease affecting cotton crops.
• Causes leaf curling, stunted growth, and reduced yield.
• Major problem in Pakistan, India, and other cotton-growing regions.
• Transmitted by whiteflies (Bemisia tabaci).

Last verified on 12-02-2026

Explanation

• Phosphorus is an essential nutrient for root development and flowering in plants.

Common phosphorus fertilizers include:

• SSP (Single Super Phosphate)
• DAP (Diammonium Phosphate)
• Nitrophos (contains N and P)

MOP (Muriate of Potash) provides potassium (K), not phosphorus.

Last verified on 12-02-2026