early forms of animation

Scientists theorize that the earth began as a waterless mass of rock surrounded by a cloud of gas. Radioactive materials in the rock and increasing pressure in the earth's interior gradually produced enough heat to melt the interior of the earth. The heavy materials such as iron, then sank. The lig..

Nature of Matter..

Introduction - Materials formed in one part of the body have to be taken up to other parts where they are needed or to be got rid of. This is an essential requirement of most animals. This function is performed by the body fluid..

Introduction - A tissue is a group of cells having a common origin, similar structure and performing a common function. Tissues are characteristic of advanced multicellular animals, commonly called as eumetazoans. They are true multicellular animals where the body cells aggregat..

All animal species, which are domesticated and grow friendly to human beings, are grouped as animal resources. These are some select species of animals. But they are large populations of each species, while wild species are large in number with smaller population in ea..

Whales Several members of the animal kingdom belong to this group. They may be fresh water or marine forms. Sponges, molluscs and Echinoderms are invertebrates that are aquatic. Amongst the vertebrates, fishes, whales and dolphins exhibit a number of adaptive features for the..

Carbon dioxide and water are the by-products of catabolism of all varieties of foodstuffs. In lower animals carbon dioxide is eliminated directly into the environment through the body surface. In higher animals it is excreted out along with the exhaled air through the lung..

Plants and animals occupy diverse habitats. It becomes practically impossible for a biologist to study each and every plant or animal species in its natural habitat. Hence, over the years attempts have been made to preserve the plant species or animal species in ..

Introduction - The animal kingdom includes eukaryotic multicellular organisms which exhibit heterotrophic nutrition. They are commonly known as animals and differ characteristically from the other major groups of plants, in their capacity to be able to move. Animals co..

Summary - Movements and locomotion takes place as a result of co-operation between the muscle and skeletal system, hence the study of both is necessary. Skeletal system in humans is formed by bones and cartilages. It helps in protection of delicate visceral organs, mechanical support, mov..