Explanation

• Sound waves are mechanical waves and need a medium to travel.
  • They travel fastest in solids, slower in liquids, and slowest in gases.
  • Solid particles are closely packed, allowing rapid vibration transfer.

Last verified on 04-02-2026

Explanation

• Citrus plants belong to the Rutaceae family.
• Includes oranges, lemons, limes, and grapefruits.
• Members are mostly evergreen trees and shrubs.
• Characterized by aromatic leaves and gland-dotted rinds.
• Widely cultivated for fruits and essential oils.

Last verified on 04-02-2026

Explanation

• Hydrogen bonding occurs when hydrogen is covalently bonded to highly electronegative atoms like O, N, or F.
• Present in water (H₂O), ammonia (NH₃), and hydrogen fluoride (HF).
• Responsible for high boiling points, surface tension, and solubility.

Last verified on 04-02-2026

Explanation

• Lichens are a combination of fungus and algae or cyanobacteria.
• Both organisms benefit from each other, forming a symbiotic relationship.
• Fungus provides structure and protection; algae/cyanobacteria perform photosynthesis.

Last verified on 04-02-2026

Explanation

• Enzyme activity depends on several factors: temperature, pH, and substrate concentration.

Additional information:

• Temperature: Too high or too low can denature enzymes.
• pH: Each enzyme has an optimal pH for maximum activity.
• Substrate concentration: Higher concentration increases rate until saturation.

Last verified on 04-02-2026

Explanation

• Water in soil exists in three forms: capillary, gravitational, hygroscopic.
• Capillary water is held in small soil pores and is available for plant roots.
• Capillary water is crucial for plant growth and nutrient transport.

Last verified on 04-02-2026

Explanation

• Viticulture specifically refers to grape cultivation.
• Uses of grapes: Fresh fruit, juice, wine, raisins

Additional information:

• Pomology → study and cultivation of fruits in general
• Olericulture → cultivation of vegetables

Last verified on 25-01-2026

Explanation

Explanation

• Holometabolous insects undergo complete metamorphosis.
• Their life cycle: Egg → Larva → Pupa → Adult.
• The young stage after egg is called larva.

Last verified on 03-02-2026

Explanation

• Halophytes are plants that thrive in saline or salty soils.
• They have adaptations to survive high salt concentrations in soil or water.
• Common in coastal areas, salt marshes, and saline deserts.

Last verified on 03-02-2026