May 31, 2023

Features passed down from one generation to the other is Heredity or Inheritance. Genes control heredity. Differences in features of individuals of the same species is variation.

May 29, 2023

Giving rise to offspring of one’s own kind is called Reproduction. Reproduction is a means for continuance of species. It is a characteristic of all living beings.

May 29, 2023

The UPSC conducts a competitive combined examination for recruitment and selection to the post of Geologist, Geophysicist and Chemist Group 'A' in Geological Society of India and Junior Hydro-geologist (Scientist 'B'), Group 'A' for Central Ground Water Board.

May 28, 2023

Nervous system (NS) and endocrine system together ensure that all the parts of the body work in a controlled and coordinated manner. NS includes brain, spinal cord, sense organs and nerves.

May 26, 2023

Excretion is the removal of harmful wastes like urea by kidneys, sweat from skin and CO₂ by lungs.

May 25, 2023

National Defence Academy (NDA) exam is conducted two times in a year by the UPSC. The exam consists of two papers: (i) Mathematics (ii) General Ability Test (GAT).

May 25, 2023

Blood transports food and oxygen to all the cells of the body. It is made of fluid plasma and cells. Plasma which transports glucose, enzymes and hormones to cells, carries waste material from liver to kidneys for removal.

May 23, 2023

Respiration provides O₂ to cells for energy production and removes CO₂ from cells.

May 22, 2023

Food is an essential requirement for obtaining energy needed for performing vital activities. Food also helps in growth, maintenance, repair and protection from various diseases.

May 22, 2023

Combined Defence Services (CDS) is conducted two times in a year by the UPSC. The exam consists of three papers: English, General Knowledge, and Elementary Mathematics.

May 21, 2023

Life Processes such as Nutrition, Respiration, Circulation and Excretion are necessary for the survival of living beings. Energy is needed for running life processes.

May 20, 2023

Cell is the structural and functional unit of life. A typical cell includes a cell membrane, cytoplasm and genetic material either within the nucleus or in the cytoplasm. The cytoplasm contains cell organelles such as mitochondria, endoplasmic reticulum lysosomes, vacuoles, ribosomes, golgi bodies.

May 19, 2023

The Earth is the only planet in the solar system which sustains life. But earth was not the same as it is today. It was a ball of gases when it was first formed about 4.5 billion years ago.

May 18, 2023

The earth came into existence 4 to 5 billion years ago and life originated around 3.4 billion years ago. In these many years, approximately 15 million different kinds of organisms have evolved. The wide variety of organisms is termed biodiversity.

May 17, 2023

Sound is the form of energy which gives the sensation of hearing. It travels in the form of waves. The wave which can travel without medium is called non mechanical or electromagnetic wave. The wave which requires medium for its propagation is called mechanical wave.

May 16, 2023

Magnet is a naturally occurring or artificially designed material which has a peculiar property of attracting some materials like iron, nickel and cobalt, called magnetic materials.

May 15, 2023

There are two types of charges: positive charge and negative charge. Like charges repel each other while opposite charges attract each other.

May 14, 2023

Light is the form of energy which makes the objects visible to us. When light reaches from object to our eyes, it becomes visible to us. Reflection, refraction and dispersion are the important properties of light.