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CBSE 9th Science | Motion – NCERT Solved Questions
Motion – NCERT Solved Questions Question 1. An object has moved through a distance. Can it have zero displacement ? If yes, support your answer with an example. Answer. Yes, it can have zero displacement. Explanation : If we take a round trip and reach back at the starting point, then we have traveled some…
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CBSE 9th Biology | Organization in the Living World – NCERT solutions
 Organization in the Living World – NCERT solutions Question 1. Who discovered cells, and how? Answer. Robert Hooke discovered cells. In 1665 under self-designed microscope, he examined a thin slice of cork. The cork resembled the structure of a honey comb consisting of many little boxes. These little boxes were termed cells by Hooke. Cell…