highest level of cellular organization

The molecules of various chemical substances in a specific proportion become organised into protoplasm - the physical basis of life. The protoplasm gets organised into cells, which represents the structural and functional unit of life. A living organism may have a single cell (unicellula..

One of the main characteristics used in defining grades of animal complexity is the presence or absence of tissues. Tissues are the aggregations of embryologically and morphologically similar cells that become arranged to perform specific functions. The protozoans occur as single cells or colonies ..

Introduction - At the molecular level all the different types of cells in living organisms are composed of certain chemical substances. The structure and function of the cell and its components are dependent on the molecular structure, arrangement and properties of these chemica..

Introduction - At the molecular level all the different types of cells in living organisms are composed of certain chemical substances. The structure and function of the cell and its components are dependent on the molecular structure, arrangement and properties of these chemica..

>Body fat - There is redistribution of fat to deeper parts of the body from the skin. In women, fat is generally stored in the hips and thighs, while in men it is stored in the abdominal area. Retention of water - The capacity of body cells to retain water decreases. This makes the skin dry and wri..

With world wide awareness about dangers of persisting pesticides in food crops, enormous interest is shown in food grown on organic farming principles. Such food is called organic food . Organic farming is a method of farming wherein synthetic chemical is not used in a..

Totipotency is the capacity of a living cell to differentiate into any type of cell forming a new organism or regenerating a lost part of the body. A cell exhibits totipotency because it contains the entire genetic information in its nucleus. This information is expressed when it becomes ..

It takes places within the cells of an organism. biochemical processes involved in respiration break down the substate to release energy in the tissues within the cells of the organism. Thus it is called cellular respiration. Gaseous exchange in plants takes place..

The outward signs of ageing are the result of changes taking place at the cellular and extracellular levels. Morphological changes: Accumulation of exhaustion pigments. The exhaustion pigments lipofusion, yellow pigments and brown deposits which are byproducts of unsaturated lip..

. Water functions as a universal solvent in which almost all polar and ionic substances can dissolve. It provides a matrix for macromolecules to assume their biologically active conformations. It has a significant role in maintaining a steady state in cells. Minerals form only about 1 to 3% of the ..