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

Explanation

• Taq polymerase is an enzyme extracted from the bacterium Thermus aquaticus.
• It is heat-stable, allowing DNA amplification at high temperatures in PCR (Polymerase Chain Reaction).
• Crucial for modern molecular biology and genetic research.

Last verified on 03-02-2026

Explanation

• Recombinant DNA is formed by combining DNA from two different sources.
• This technology allows insertion of a gene from one organism into another.
• Used in medicine, agriculture, and biotechnology for desired traits.

Last verified on 03-02-2026

Explanation

• Refrigerants are gases used in refrigerators to absorb heat and provide cooling.
• Freon (CFCs) and ammonia are commonly used in domestic and commercial refrigeration.
• They evaporate at low temperatures, absorbing heat from the fridge interior.
  

Last verified on 03-02-2026