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Biology 10th Class Biology

Chapter 10 Gaseous Exchanges – 10th Class Biology Notes

Chapter 10 Gaseous Exchanges – 10th Class Biology Notes Question 1: Define gaseous exchanges, breathing and cellular respiration? Answer: Gaseous exchanges: Taking in oxygen and giving out of carbon dioxide is termed as gaseous exchange.  “OR” The exchange of gases in body of living organisms through a characteristic way is called gaseous exchanges. Gaseous exchanges is […]

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Biology 9th Class Biology

Chapter 9 Transport – 9th Class Biology Notes

Chapter 9 Transport – 9th Class Biology Free And Easy Notes Question#1): What is the primary function of transport system? Answer:The primary function of transport system is to maintain a link between all cells of the body and the external environment. It transports the nutrients and water to the points where they are to be […]

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Biology 9th Class Biology

Chapter 8 Nutrition – 9th Class Biology Notes

Chapter 8 Nutrition – 9th Class Biology Notes Question#1) Define the following terms? I) Nutrition. II) Nutrients. III) Autotrophs.  IV) Heterotrophs. Answer: I) Nutrition: The process in which food is obtained or prepared, absorbed and converted into body substances for growth and energy, is called nutrition. II) Nutrients: Nutrients are the elements and compounds that […]

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Biology 9th Class Biology

Chapter 7 Bioenergetics – 9th Class Biology Notes

Chapter 7 Bioenergetics – 9th Class Biology Free and Easy Notes Question#1) How energy is produced in the body of living organisms? Answer: Energy is produced in the body of living organisms by the breakdown of food. During oxidation reduction reactions the chemical bond in substances break down and energy is produced.

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Biology 9th Class Biology

Chapter 6 Enzymes 9th Class Biology Notes

Enzymes 9th Class  Biology Notes Question#1) Write a short note on enzyme? Answer: Enzyme: Enzymes are proteins that catalyze (speed up) biochemical reactions by lowering its activation energy and are not changed during the reaction. All enzymes are catalysts but all catalysts are not enzymes. Only biocatalysts are called enzymes. Word enzyme was first used […]

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Biology 9th Class Biology

Chapter 3 Biodiversity 9th Class Biology Notes

Biodiversity 9th Class Biodiversity 9th Class Notes Chapter  Number 3 Complete 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 […]

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Biology 9th Class Biology

Chapter 1 Introduction to Biology – 9th Class Biology Notes

INTRODUCTION TO BIOLOGY   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. […]