Periyar notes for Tnpsc

E.V.Ramasamy is famously called Periyar. He was born in 1879 in a rich family that does business in Erode. Periyar questioned superstitious beliefs even in his young days. He became Chairman of Erode Municipality. E.V.Ramasamy fought against various social evils and superstitious beliefs such as the enslavement of women. As he fought against the social … Read more

Social Geography of India, Population density, and distribution Upsc

Social Geography Social Geography is the branch of human geography. It studies the relationship between society and space. Also, it is related to sociology, social phenomena, and their components. Social geography includes settlement patterns, human development, population composition, etc. It also consists of primary, secondary, and tertiary activities. Fitzgerald first tried to define social geography … Read more

Disaster management in India Upsc

On average, 232 million people are affected by different types of disasters every year. Emergency management is very important, in recent years disaster risks have been on the rise due to factors such as population growth, unplanned urbanization, environmental degradation, conflicts and competition for scarce resources, climate change, disease epidemics, poverty, and pressure from development … Read more

Matthias Schleiden Cell Theory

In 1833, Matthias Schleiden and Theodar Schwann proposed Cells as basic building blocks of all animals and plants. Their observation led to the formation of Cell Theory. All living things are made of cells. New cells are formed by cell division. Cells contains genetic material that are transferred from parent to offspring. Every metabolic reaction … Read more

Classification of Living Organisms Tnpsc

Three domains of classification All the organisms are classified into 3 major domains. Archaebacteria They are thermophilic or heat-loving bacteria. These bacteria live in high-temperature vents. Eubacteria Eubacteria is a single-celled organism that is without a well-developed nucleus. Eukarya Eukarya means ‘True Nucleus’. Eukarya are organisms that have a well-formed nucleus in their cell/cells. Five … Read more

* * All the Notes in this blog, are referred from Tamil Nadu State Board Books and Samacheer Kalvi Books. Kindly check with the original Tamil Nadu state board books and Ncert Books.