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Physics X | CHAPTER – 10 | Light – Reflection and Refraction
CHAPTER – 10 Light – Reflection and Refraction We see a variety of objects in the world around us. However, we are unable to see anything in a dark room. On lighting up the room, things become visible. What makes things visible? During the day, the sunlight helps us to see objects. An object reflects…
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Biology X | Heredity and Evolution | EVOLUTION SHOULD NOT BE EQUATED WITH ‘PROGRESS’ and Human Evolution
EVOLUTION SHOULD NOT BE EQUATED WITH ‘PROGRESS’ In an exercise of tracing the family trees of species, we need to remember certain things. Firstly, there are multiple branches possible at each and every stage of this process. So it is not as if one species is eliminated to give rise to a new one. A…