Explanation

• Mitochondria are called the powerhouse of the cell.
• Because they produce Adenosine Triphosphate (ATP).
• ATP is the energy currency of the cell.
• ATP provides energy for different cellular activities such as movement, growth, and transport.
• Energy is produced through aerobic cellular respiration using oxygen and الغذائی molecules.
• They are found in the cytoplasm of most eukaryotic cells.
• Richard Altmann first described mitochondria in 1890.

Main Parts of a Cell:

1. Cell membrane → Outer protective layer
2. Nucleus → Controls cell activities
3. Cytoplasm → Jelly-like material between membrane and nucleus

Last verified on 09-05-2026

Explanation

• Photosynthesis produces glucose and oxygen.
• Green plants use sunlight, water, and carbon dioxide.
• This process occurs in chloroplasts using chlorophyll.
• Glucose is used as food for energy and growth.
• Oxygen is released as a byproduct into the atmosphere.

Last verified on 10-03-2026

Explanation

• Species is the basic unit of classification.
• Species are a group of organisms that are morphologically similar and can interbreed.
• Classification system as proposed by Linnaeus.

These groups or levels are:

1. Kingdom
2. Phylum
3. Class
4. Order
5. Family
6. Genus 
7. Species

Species is the smallest unit of classification.

Last verified on 20-05-2026

Explanation

• Metals allow electricity to pass through them easily.
• Among all metals, silver has the highest electrical conductivity.
• Copper and gold are also very good conductors.
• Silver is widely used in high-precision electrical applications.
• Copper is commonly used in wiring due to cost-effectiveness.

Last verified on 16-05-2026

Explanation

• The longest cell in the human body is the nerve cell (neuron).
• Some neurons can extend up to 1 meter in length.
• They transmit impulses throughout the body.

Additional information:

• The smallest cell in the human body is the sperm cell (spermatozoon).
• It is measures approximately 4–5 micrometers (µm) in length.
• It is mainly consisting of a nucleus and a tail.

Last verified on 23-04-2026

Explanation

• The scientific study of different aspects of plants is called botany.
• Plant biology or Phytology, is the science of plant life and a branch of biology.

Additional information:

• Study of soil is called Pedology
• Study of grasses is called Agrostology
• Study of food is called Bromatology
• Study of cells is called Cytology
• Study of animals is called Zoology
• Study of skin is called Dermatology
• Study of insects is called Entomology
• Study of eggs is called Oology
• Study of earthquakes is called Seismology
• Study of viruses is called Virology
• Study of bacteria is called Bacteriology
• Study of the heart is called Cardiology 
• Study of fermentation is called Zymology

Last verified on 31-03-2026

Explanation

• The study of tissues is called Histology.
• It involves examining the structure, composition, and function of cells and tissues under a microscope.
  

Additional information:

• Geology is the study of rocks and Earth's structure.
• Radiology is the study of medical imaging techniques like X-rays and MRI.

Last verified on 22-01-2026

Explanation

Explanation

• Taxonomy is the science of classifying living things, including animals and plants, into groups based on their characteristics, evolutionary relationships, and common ancestors.
• It involves the identification, naming, and classification of species, as well as the study of their relationships and evolutionary history.

Explanation

Entomology is the study of insects and their relationship to humans, the environment, and other organisms.

while

Zoology is the study of all animals.

Biology is a natural science concerned with the study of life and living organisms.

Etymology investigates and documents the lives.