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Diet is the total amount of food consumed by a person. Nutritious food contains all the essential nutrients proteins, fats, carbohydrates, vitamins and minerals. A balanced diet should contain all these in the correct proportions and sufficient quantity. The word  diet implies a particular intake of food for health or weight management reasons. Nutrition is the provision of materials to an organism to support its life. Food is a thing which, when eaten and digested, can be used by the body to provide energy, or substances that help in the body building and repair or in the preservation of health.     Foods may be grouped into types according to whether they are solid or liquid. Solid food are potatoes, rice, beans and liquid foods are milk, fruit juices.     Foods can also be grouped into classes based on the chemical composition of the food and the nutrients present in the food. Foods are grouped into six classes, namely carbohydrate, protein, fats, vitamin...

Most assuredly whales are not fish,Whales and men trace the same ancient lineage through creatures born in the warm water of the primal oceans who exiled themselves to the precarious environment of the dry land. Although they bear a superficial resemblance to fishes, whales have little in common with the scaly tribe. When they returned to the sea they brought with them an intelligence of a radically new order one that had evolved as a direct consequence of the ferocious difficulties which all terrestrial animals must face in order to survive. On the other hand, the emerging human stock had to battle desperately for survival in a bitterly rigorous environment, not only against an array of other animals which were often physically and functionally superior, but against the organized and warlike competition of their own species. Going out and coming back to the sea enables them to survive successfully as a natural beings yet they were beings who, like protoman endowed with a great intel...

Advertising is one of the ways in which merchant and manufacturers market their goods. Advertising does two things, it tells the buyers that a certain product is for sale, and where they can buy it. Publicity also means the same as advertising, though usually with a rather special sense. If a manufacturer is about to open a new factory, he may advertise in newspapers and put up posters or display it in the media.     Advertising and publicity both really date from an early stage in man's life, every trade sign over a shop is a kind of advertisement, and trade signs certainly go back at least as far as the days of ancient Rome. An actual display of the goods is another old form of advertising. In medieval times a good deal of advertising took place at the regular trade fairs held in importance centres. Fairs and exhibitions are still held today in the various parts of the world. There are various ways of advertising. Direct advertising includes not only circulars, booklets, ...

Counter trade, a modern variant of the age old system of trade by barter, has emerged as a new feature of economic relationship. For a nation which is suffering from a drastic reduction in its foreign exchange earnings and trade arrears with Western export credit agencies, counter trade has the attraction of providing goods for the domestic market without draining the scarce foreign exchange. The low credit rating which the country has in the international capital market and the unwillingness of the government to adhere strictly to the international monetary fund's supervised adjustment programme also favour counter trade in the system.     However, there are grounds for insisting that counter trade should be used with caution. Counter trade is a form of gambling. As with every other forms of trade by barter, one partner is inevitably going to be better off than the other in the end. This will be determined by what monetary value is assigned to the goods exchanged and how c...

 The idea of a fish being able to generate electricity strong enough to light lamp bulbs or even to run a small electric motor is almost unbelievable, but several kinds of fish are able to do this. Even more strangely, this curious power has been acquired in different ways by fish belonging to very different families. The best known are the electric rays, or torpedoes, of which several kinds live in warm seas. They possess on each side of the head, behind the eyes, an organ consisting of small hexagonal shaped cells rather like a honey comb. The cells are filled with a jelly like substance, and contains a series of flat electric plates.    The fish gives an even more powerful shock. The system is different from that of the torpedo in that the electric plates run longitudinally and are supplied with nerves from the spinal cord. Consequently, the current passes along the fish from head to tail. The electric organs of these fish are really altered muscles and like all mus...

The most basic contribution of agriculture to economy is, the supply of foodstuff to the populance, and the provision of employment and the means of livelihood. But beyond these, agriculture also provides raw materials for industry and contributes to the improvement of the nation's foreign exchange through export as well as savings in import.     The issue that people must address themselves, is the role agriculture should play in relation to the other sectors of the economy. In developing agriculture, a nation has several options to follow. It may stress the role of agriculture as an important instrument for sustaining expansion in the non agricultural sector of the economy. A nation can stress agricultural development because it can yield huge sum of money in foreign exchange or because it can absorb abundant cheap labour. Therefore, any country that wants to use agriculture to develop its economy must understand these options before setting up strategies for implementing...

Health and peace of mind are among life's greatest treasures. Must of us may enjoy a fuller degree of physical health and none need lack of mental peace. The fact is obvious that on every hand we find suffering and disease, people are afflicted with all kinds of ailments, among which cancer, diabetes and diseases of the heart and blood vessels rank high. Increasing demand is made on the hospital services. As we become aware of the prevailing condition, we might well ask how can we avoid serious illness?     A disease condition developes when we do not maintain health, disease is the absence of health. Thus, the physician combats disease, not so much by concentrating on the disease itself, as by seeking to restore health. It is recognized that the right approach to the problem of curing or avoiding disease, is to concentrate on restoring or maintaining positive health. Generally speaking, the same rules she follows in order to maintain health, her patients must follow in ord...