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Showing posts with the label Types of Mountains

Cell – The Basic Unit of Life | Functions, Organelles & MCQs

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🧬Cell – The Basic Unit of Life A cell is the smallest structural and functional unit of life . It is the building block of all living organisms, carrying out essential processes like growth, energy production, and reproduction. For competitive exams like NEET , UPSC, SSC, and State PSCs, understanding the structure and functions of the cell is important because it forms the foundation of biology. Questions are frequently asked on cell theory , organelles , plant vs. animal cells, and cell division , making this topic a high-scoring and must-prepare section . 🕵🏻‍♂️Discovery of Cell The discovery of the cell was a turning point in biology, and many scientists contributed step by step to our understanding. In 1665, Robert Hooke observed thin slices of cork under a simple microscope and saw small box-like structures. He called them “cells” because they looked like the tiny rooms (cells) in a monastery. In 1674, Anton van Leeuwenhoek developed a better microscope and was ...
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Classification of mountains on the basis of Location, Origin, Formation

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  Mountains are landforms that rise above the Earth's surface, characterized by slopes, steep sides, and a pointed top called a peak. They are formed due to tectonic forces, volcanic activity, or erosion. Mountains play a vital role in influencing climate, storing freshwater, and supporting biodiversity."  William Morris Davis defines mountains as elevated land masses formed by endogenic forces, undergoing a cycle of youth, maturity, and old age through erosion. Types of Mountains Based on the Period of Origin Earth has experienced a total of  nine major orogenic movements  (mountain-building phases) throughout its geological history. Some of these orogenies occurred in the Precambrian era , dating back 3,500 to 600 million years ago , and are among the oldest known. The three most recent and geologically significant orogenies are: Caledonian Orogeny (around 400 million years ago) Hercynian Orogeny (around 300 million years ago) Alpine Orogeny (began around 65 mi...
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