Explanation

• A change of 1 Kelvin (K) is equal in magnitude to a change of 1 degree Celsius (°C).
• Therefore, a rise of 10 K equals a rise of 10°C.
• The numerical values of Kelvin and Celsius differ when expressing an actual temperature, but their temperature intervals are equal.

Last verified on 16-10-2026

Explanation

• Strain is the ratio of the change in length to the original length of a material when a force is applied.
• It measures the relative deformation of a material.
• It has no unit, because it is a ratio of two lengths.

Last verified on 16-10-2026

Explanation

• Phosphorus fixation occurs when phosphorus reacts with soil minerals and forms compounds that plants cannot readily absorb.
• In acidic soils, phosphorus commonly reacts with iron and aluminium compounds; in alkaline or calcareous soils, it may precipitate with calcium.

Last verified on 16-10-2026

Explanation

• Cactus is a CAM plant.
• CAM plants minimize photorespiration by concentrating CO₂ around the enzyme Rubisco during photosynthesis.

Last verified on 16-10-2026

Explanation

• Lipids (fats) are generally present in relatively low amounts in most fruits and vegetables.
• Fruits and vegetables mainly provide water, vitamins, minerals, dietary fibre, and carbohydrates.

Last verified on 16-10-2026

Explanation

• Vitamins A, D, E, and K are fat-soluble vitamins, not water-soluble.
• Vitamin B-complex and Vitamin C are water-soluble vitamins.

Additional information:

• Vitamin A: Important for vision and healthy skin.
• Vitamin K: Essential for normal blood clotting.
• Vitamin C: Helps in collagen formation and wound healing.

Last verified on 16-10-2026

Explanation

• A current meter is an instrument used to measure the velocity of flowing water in rivers, canals, and streams.
• The instrument is placed at selected points in the water, and its readings help determine the flow velocity.
• Water discharge can then be calculated using the measured velocity and the cross-sectional area of the channel.

Last verified on 16-10-2026

Explanation

• Capillary water is retained in the small pores of soil by capillary forces arising from surface tension and adhesion.
• It is the main form of soil water available for plant absorption.
• Capillary water can move through soil pores in response to differences in water potential.

Last verified on 16-10-2026

Explanation

• Field capacity is the amount of water remaining in soil after excess gravitational water has drained away.
• At this stage, the soil retains water in its pores, making much of it available for plant roots to absorb.
• Field capacity is an important measure for irrigation scheduling and determining the water-holding capacity of soil.

Last verified on 16-10-2026

Explanation

• Capillary water is held in the small pores of soil.
• It is the main source of water available for plant absorption.
• It is retained by capillary forces, allowing plant roots to absorb it against gravity.

Last verified on 16-10-2026