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ECOLOGY FORM THREE ECOLOGY FORM THREE ,Ecology is the study of organisms and their environment. All organisms show interdependence on one another. Organisms are affected by their environment, and they in turn affect the…

CLASSIFICATION II FORM THREE CLASSIFICATION II FORM THREE General Principles of Classification Classification is the science that puts organisms into distinct groups to make their study easy and systematic. Modern scientific…

EXCREATION AND HOMEOSTASIS EXCREATION AND HOMEOSTASIS ,Excretion is the process by which living organisms separate and eliminate waste products of metabolism from body cells. If these substances were left to accumulate, they…

GASEOUS EXCHANGE IN PLANTS AND ANIMALS Necessity for Gaseous Exchange in Living Organisms Living organisms require energy to perform cellular activities. The energy comes from breakdown of food in respiration. Carbon (IV)…

RESPIRATION RESPIRATION ,Meaning and Significance of Respiration Respiration is the process by which energy is liberated from organic compounds such as glucose. It is one of the most important characteristics of living organisms.…

TRANSPORT IN PLANTS AND ANIMALS. TRANSPORT IN PLANTS AND ANIMALS. Transport is the movement of substances within an organism. All living cells require oxygen and food for various metabolic processes. These substances must be…

NUTRITION IN PLANTS AND ANIMALS  Structure of the Leaf External Structure NUTRITION IN PLANTS AND ANIMALS The external structure of the leaf consists of a leaf stalk or petiole and a broad leaf blade or lamina. The lamina has…

INTRODUCTION TO BIOLOGY INTRODUCTION TO BIOLOGY ,Biology derived from Greek words-BIOS meaning LIFE and LOGOS meaning STUDY or KNOWLEDGE. Biology means "life knowledge". It is the study of living things/organisms. Branches of…

OCEANS, SEAS AND THEIR COASTS OCEANS SEAS AND THEIR COASTS An ocean is a large and extensive body of saline water occupying a basin between continents while a sea is a large body of saline water on the margins of continents. Nature of…

GLACIATION GLACIATION Action of moving ice. Glacier - Mass of ice moving outward from an area of accumulation. Formed when snow accumulates on the surface, lower layers are compressed to a harder mass resulting in opaque ice due to…