Explanation

• Bacteria reproduce asexually mainly by binary fission, where one cell splits into two identical cells.
• This is a rapid process, allowing bacteria to multiply quickly under favorable conditions.

Last verified on 12-02-2026

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

• Rhizobium bacteria live in root nodules of leguminous plants (e.g., peas, beans).
  • They convert atmospheric nitrogen (N₂) into ammonia (NH₃), a usable form for plants.
  • This process is called nitrogen fixation.
  • It enriches soil fertility naturally.
  • Essential for plant growth and agriculture.

Last verified on 12-01-2026

Explanation

• Protein foods come from both animal and plant sources.
  • Animal sources include seafood, meat, poultry, and eggs.
  • Plant sources include beans, peas, lentils, nuts, seeds, and soy products.
  • These foods help in body growth and tissue repair.
  • Protein is an essential nutrient.

Last verified on 12-02-2026

Explanation

• Enzymes are biological catalysts that speed up chemical reactions in living organisms without being consumed.
• They are mainly made of proteins.
• They are highly specific to their reactions.

Additional information:

• Some enzymes require cofactors like vitamins or metal ions to function.
• Examples: Amylase (breaks starch), Lipase (breaks fats), Protease (breaks proteins).

Last verified on 11-02-2026

Explanation

• The following table provides the botanical names for a variety of familiar plants: 

Rice : Oryza sativa

• Apple : Malus domestica
• Carrot : Daucus carota
• Coconut : Cocos nucifera
• Cucumber : Cucumis sativus
• Ginger : Zingiber officinale
• Mango : Mangifera indica
• Oak tree : Quercus
• Onion : Allium cepa
• Potato : Solanum tuberosum
• Wheat : Triticum aestivum
• Rose : Rosa
• Sunflower : Helianthus annuus
• Tomato : Solanum lycopersicum

Explanation

• Arthropods are divided into different classes based on body structure, legs, and antennae.
• Spiders, ticks, and mites have eight legs and no antennae, which classifies them differently from insects.
• These belong to the class Arachnida.

Last verified on 11-02-2026

Explanation

Non-renewable energy sources:

• Oil
  
• Nuclear energy
• Petroleum
• Natural gas & coal

Renewable sources of energy:

• Solar energy
• Wind energy
• Hydroelectric power
• Biomass energy
• Geothermal energy
• Tidal energy

Last verified on 11-02-2026

Explanation

• After fertilization, the ovary develops into a fruit, enclosing the seeds.
• Meanwhile, each ovule inside the ovary develops into a seed.

Last verified on 11-02-2026

Explanation

• Chloroplast is the plant cell organelle that performs photosynthesis.
• It contains chlorophyll, the green pigment that captures sunlight to produce food (glucose) for the plant.

Additional information:

• Mitochondria: Powerhouse of the cell, produces energy via respiration
• Nucleus: Controls cell activities and stores DNA

Last verified on 11-02-2026