SS 1 Biology (1st, 2nd & 3rd Term)

Autotrophic Nutrition This is the type of nutrition in which the organisms are able to manufacture their own food. Organisms which can manufacture or synthesize their own food are called autotrophs. Autotrophic nutrition is carried out by all green plants through the process of photosynthesis and by some certain bacteria through the process of chemosynthesis […]

ANIMAL NUTRITION (FOOD SUBSTANCES) Food is a complex energy-rich organic matter which living organism feed on to obtain nutrients and substances necessary for life. Food substances are classified to six groups (i) Carbohydrate     (ii) Protein       (iii) Fat and oils    (iv)  Mineral salts  (v) Vitamins     (vi) Water and roughages. Carbohydrates These are made up of carbon,

Nutrient cycle is defined as the circulation of certain nutrient such as carbon, sulphur and water in nature Carbon Cycle The carbon cycle is the way carbon (iv) oxide is being used from the atmosphere by photosynthesis and put back into the atmosphere by respiration and decay. The carbon cycle involves the following processes Photosynthesis,

Nutrition is defined as the process by which living organisms obtain and utilize food material from external environment for metabolic activities such as respiration, growth, excretion and reproduction. Photosynthetic or holophytic Nutrition is defined as a process whereby green plant manufacture their own organic food from simple inorganic substances such as carbon (iv) oxide, water,

Organization of life is defined as the existence of life from a single called organisms to a multicellular organisms with complex form that perform different functions Levels of Organization 1  First level (cell): A cell which is the functional and structural unit of protoplasm bounded by a membrane is the first level of organization. It

Classification is defined as the arrangement of living things into groups based on structural genetic and cellular organization.  This is called TAXANOMY.The system of classification of living things  used today is based on that introduced by Swedish naturalist named Carl Von Linne(1707-1778).His name was better known in Latin as Carolus Linnaeus.He published the classification of

Living things are those objects that have life e.g. plant and animals. Non-living things are those objects without life or lifeless objects.           CHARACTERISTICS OF LIVING THINGS MOVEMENT: is defined as the ability of a living organism to move its own body or part of its body from one place to another. Living things

Science is defined as a systematic process of making enquiry about the living things and non-living things in our environment. The term Biology is coined from two Greek work bios meaning life and Logos meaning study. Therefore Biology is simply defined as study of life i.e. study of living things or Biology is defined as