Explanation

• The Economic Injury Level (EIL) is the lowest pest population that can cause economic damage to crops.
• It is a key concept in Integrated Pest Management (IPM) to determine when pest control is justified.
• Pest control is recommended before reaching EIL to prevent loss.

Last verified on 22-01-2026

Explanation

• Ricinus communis (Castor) belongs to the Euphorbiaceae family.
• It is a tropical perennial plant grown for castor oil, seeds, and industrial uses.
• Members of Euphorbiaceae often have milky latex and diverse flower types.

Additional information:

• Castor oil is used in medicine, cosmetics, and industrial lubricants.
• The plant is also known for toxic compound ricin in seeds if ingested raw.

Last verified on 22-01-2026

Explanation

• Observed average increase per decade: 0.14°F.
• Total increase since late 19th century: ~1.0–1.2°F.
• Arctic regions warm twice as fast as global average.
• 2020s are among the hottest decades recorded.
• Temperature rise contributes to extreme weather events globally.

Last verified on 22-01-2026

Explanation

a*b = (a+b) + ab

3_4 = (3+4) + 3×4 = 7 + 12 = 19

2_3 = (2+3) + 2×3 = 5 + 6 = 11

(3_4) - (2_3) = 19 - 11 = 8

Explanation

• Fennel (Foeniculum vulgare) is a perennial plant, meaning it lives for more than two years.
• It grows leaves, flowers, and seeds in multiple seasons once established.
• Widely cultivated for its edible seeds, leaves, and essential oil.

Last verified on 22-01-2026

Explanation

Speed = 90 km/h = 25 m/s

Distance = 25 × 21 = 525 m

Length of tunnel = 525 - 130 = 395 m

Last verified on 22-01-2026

Explanation

• Melilotus alba (white sweet clover) contains coumarin, a naturally occurring chemical.
• Coumarin can be toxic to livestock if the plant spoils and ferments, leading to sweet clover disease.
• It affects blood clotting and can cause hemorrhages in animals.

Last verified on 22-01-2026

Explanation

• The flag leaf is the uppermost leaf of cereal plants like wheat and rice.
• It plays a crucial role in grain filling by providing energy through photosynthesis.
• The flag leaf contributes most of the carbohydrates for developing grains.

Last verified on 22-01-2026

Explanation

• The process of converting double-stranded DNA into single-stranded DNA is called denaturation.
• It occurs when hydrogen bonds between base pairs break due to heat, extreme pH, or chemicals.
• Denaturation is essential in molecular biology techniques like PCR to separate DNA strands.

Last verified on 22-01-2026

Explanation

• Most insects are found in tropical regions where the climate is warm and humid.
• Tropical regions provide abundant food, moisture, and vegetation for insects.
• Polar and desert regions have extreme climates unsuitable for most insects.

Last verified on 22-01-2026