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Plant Nutrition
Introduction - The plants upon which we depend for the food we eat, and for the oxygen we breathe, depend in turn upon the soil. A good soil supplies the plants with the mineral elements they use. Vigorous, highly productive plants can be grown in solutions of fertilizer mineral..
Chemical Preservatives
Chemical Preservatives - Chemicals added to food materials to prevent the growth of micro organisms or prevent spoilage and to increase their shelf life are called preservatives. Some examples are given below: Sodium benzoate is used as a preservative for fruits, fruit juices, jams and sq..
Functions of Cytoplasm
Cytoplasm serves the following functions It is the seat of all metabolic and bio-chemical processes taking place in a cell. It is involved in the storage of raw materials or reserve food required by the cell. It brings about exchange of materials between the cell organelles. It ..
Trophic Levels
Trophic Levels - Each link in a food chain is known as a trophic level. For example, in each food chain, plants always form the first trophic level. The plant eating animals called herbivores like insects, rodents, rabbits, deer, cattle, etc. form the second trophic le..
Trophic Levels - Each link in a food chain is known as a trophic level. For example, in each food chain, plants always form the first trophic level. The plant eating animals called herbivores like insects, rodents, rabbits, deer, cattle, etc. form the second trophic le..Nutrition
Nutrition can be defined as the process by which an organism obtains food which is used to provide energy and materials for its life sustaining activities. Thus the term nutrition includes the means by which an organism obtains its food and also the processes by which the nutrie..
Nutrition can be defined as the process by which an organism obtains food which is used to provide energy and materials for its life sustaining activities. Thus the term nutrition includes the means by which an organism obtains its food and also the processes by which the nutrie..Phagocytosis
It is the intake of a solid material by a cell. Just like pinocytosis, it involves the invagination of cell membrane in the region where the macromolecule is present. The invagination traps the solid and gets pinched off to form a phagocytic vesicle (or phogosome). The process is commonly called a..
Carbon in Nature
Carbon is an extremely important element and was known from the earliest times in the form of charcoal, soot, etc. Although the amount of carbon in the earth's crust is only eleventh by mass, it ranks as high as oxygen and hydrogen, in importance. In nature, it occurs mainly as coal and petro..
Introduction
We heat raw food to soften it. We freeze water into ice by cooling it in refrigerator. When we boil water in a kettle we observe the steam oozing from the mouth of the kettle. When the cork is difficult to remove, we slightly heat the mouth of the bottle, so that the cork comes ..
Effect of Heating
Introduction - We heat raw food to soften it. We freeze water into ice by cooling it in refrigerator. When we boil water in a kettle we observe the steam oozing from the mouth of the kettle. When the cork is difficult to remove, we slightly heat the mouth of the bottle, so that ..
Introduction to Coal and Petroleum
Introduction - Man's quest for sources of energy is inexhaustible. Early man depended mainly on muscular energy and later began to use wind and flowing water as sources of energy. He learned the art of making and controlling fire. Fire became his source of light at night. He used fire for warmth an..
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