origin of food

Poultry includes all domestic birds - chicken, ducks, geese and turkey. They are reared for their meat and eggs. Poultry farming in India has made rapid strides as poultry management is being done on scientific lines. The three indigenous breeds of fowls are Arlee or Indian Game (provides good mea..

They are faecal pellets that contain evidences of the food eaten. For example, teeth and scales. The oldest fossil-bearing rocks contain fossils of few organisms that were simple. However, the younger rocks contain more fossils and these fossils show more complex structure indicating tha..

Manures are organic materials added to the soil to increase crop production. They are biological in origin. The organic matter content is bulky and large and the nutrient content is small. They have the following effect on the soil. They supply nutrients to the soil. Since the manures con..

The original Animal Kingdom proposed by Linnaeus included the protozoans, sponges, jelly fishes, worms, crabs, insects, spiders, snails, starfishes, sharks, bony fishes, frogs, lizards, birds and mammals. In general, animals exhibit the following distinguishing characters. The animal body..

Earth is the only planet on which life exists. It consists of three components Lithosphere (Land), Hydrosphere (Water) and Atmosphere (Air). Life originated and evolved because of this unique combination of the three components and was ideal and favourable for life. The life supportin..

It is the name given to the theory proposed by Charles Darwin (1809-1882). It is also known as the theory of natural selection. He formulated this theory along with another English biologist, Alfred Russel Wallace (1823-1913) in the year 1858. fig. 5.6 - Charles Darwin This theory is the resul..

Ploidy Breeding - An organism, in which number of complete chromosome sets is more than the diploid number is called polyploid. It is usual practice to express the chromosome number of an organism in diploid, symbolically represented by 2n. In all sexually propagated crops, such expression is of sp..

Carbon is an element which is of immense significance to us in both its elemental form and in the combined form. Most of what surround you will some compounds of carbon, including your family members and pets! The list given below illustrates the importance of carbon compounds in our daily life: ..

Forests and Wild Life - The biotic component of our environment on land, i.e. plants and animals (leaving aside the oceans and other water bodies) are overwhelmingly found in forests. Forests form a buffer for the earth to protect life forms; in fact that's where all our biodiversity and including ..

An angiosperm plant body is composed of two basic types of tissues namely meristematic and permanent tissues. Meristematic tissue is formed by undifferentiated, embryonic cells called meristematic cells. Meristematic cells are compactly arranged. They have thin cell wall abundant cytoplasm ..