Cells and Tissues – Class 9 Biology Chapter 4 Notes

Question#1) Define Microscopy? What are different types of Microscope? Answer:- Microscope; An optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times. Microscopy:- Microscopy is the use of microscope to observe minute living organisms. Invention of microscope:- The first compound microscope was developed …

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Biodiversity – Class 9 Biology Chapter 3 Notes

Question#1) Define Biodiversity? Answer: Biodiversity: The term “biodiversity” has been derived from ‘bio’ and ‘diversity’.  Biodiversity is a measure of the variety of organisms present in different ecosystems or earth surface. Flora: Diversity of plants in an ecosystem is called flora. Fauna: Diversity of animals in an ecosystem is called flora. Question#2) How many kinds …

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Solving a Biological Problem – Class 9 Biology Chapter 2 Notes

Question#1) Define science and Scientific method? Answer; Science: word science is derived from scientia means knowledge. Science is the systemized knowledge derived from observations and experiments. “OR” The knowledge that gives understanding about this world and how it works is called science. “OR” The systemized knowledge obtained by observations and experiments is called science.

Introduction to Biology – Class 9 Biology Chapter 1 Notes

Question#1) Define Science and Biology? Answer: Science: Word science is derived from scientia means knowledge. Science is the study in which observations are made, experiments are done and logical conclusions are drawn in order to understand the principles of nature. “OR”  The knowledge obtained through observations and experiments is called science. Biology: The word “biology” …

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