BIOLOGY (BIO) SSS 3- FIRST TERM 1. Regulation of Internal Environment 2. Nervous Co-ordination 3. Sense Organs 4. Ecology of Population 5. Balance in Nature 6. Reproductive System and Reproduction in Humans BIOLOGY (BIO) SSS 3- SECOND TERM 1. Development of New Seeds 2. Fruits 3. Reproductive Behaviours 4. Biology of Heredity (Genetics) 5. […]
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DIHYBRID INHERITANCE Gregor Mendel crossed plants which differ in two pairs of contrasting characteristics e.g. seed shape (round or wrinkled seeds) and seed colour (yellow or green seeds). He crossed plants having round and yellow seeds with these having wrinkled and green seeds. The F1 seeds were having round and yellow seeds. Self-pollinating F1 plants
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Carbohydrate, mainly glucose is the main substrate inside cells. Lipids i.e. fatty acids and glycerol are also used. Fatty acids are used when the carbohydrates are exhausted. A molecule of lipid yields much more energy than a molecule of glucose. Proteins are not normally used for respiration. However during starvation they are hydrolysed to amino
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MATERIALS NEEDED FOR COLLECTION OF ORGANISMS Knives to cut portions of plant stem/root or uproot Polythene bags to put the collected plant or specimens Insect collecting jars Insect killing jars Hand gloves Sweep nets Pooters Traps Observation of Organisms Observe the plant/animal in its natural habitat before collecting Identify the exact place -on surface,
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COMMON DENTAL DISEASES – Carries, Causes, Treatment & Periodontal Diseases Dental Carries Dental carries are the holes or cavities that are formed as acid corrodes enamel and eventually the dentine Causes This is caused by bacteria acting on the food left between teeth and on the cusp Acids are formed that eventually corrode the enamel
These are organic compounds that are essential for proper growth, development and functioning of the body. Vitamins are required in very small quantities They are not stored and must be included in the diet Vitamins Band C are soluble in water, the rest are soluble in fat Various vitamins are used in different ways
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A carb is a macronutrient—a sugar, starch or fiber found in grains, fruits, vegetables, and dairy products. They’re hard to avoid and they’re one of the most basic food groups humans need to stay alive. Sources of Carbohydrates Carbohydrates are found in a wide array of both healthy and unhealthy foods—bread, beans, milk, popcorn,
SOCIAL ANIMALS – MEANING, CHARACTERISTICS, IMPORTANCE & LIFE HISTORY Social animals are those in which individuals of the same species live together cooperatively in organized communities known as societies (colonies). Examples of social animals are: social insects (like termites, honey bees or wasps, ants etc), wolves, foxes, baboons etc. Characteristics of Social Insects
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INTRODUCTION TO BIOLOGY What is Biology? Biology derived from Greek words – BIOS meaning LIFE and LOGY meaning STUDY or KNOWLEDGE. Biology means “life knowledge”. It is the study of living things/organisms BRANCHES OF BIOLOGY Botany – study of plants Zoology – study of animals Microbiology – study’ of microscopic organisms Morphology – study
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WATER RELATIONS IN PLANT AND ANIMAL CELLS The medium (solution) surrounding cells or organisms is described by the terms hypotonic, hypertonic and isotonic. A solution whose solute concentration is more than that of the cell sap is said to be hypertonic A cell placed in such a solution loses water to the surroundings by osmosis
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