Question

les e can bod rea is continuously throughout their webpan. ma only up to a certain age. However, cell division occurs in certain tissu met replace lost cells. Unicellular organisms grow by cell division. One easily observe this in in vitro cultures by simply counting the number cells under the microscope. In majority of higher animals and plants growth and reproduction are mutually exclusive events. One mu remember that increase in body mass is considered as growth. Non-livine objects also grow if we take increase in body mass as a criterion for growth Mountains, boulders and sand mounds do grow. However, this kind of growth exhibited by non-living objects is by accumulation of material on the surface. In living organisms, growth is from inside. Growth, therefore wat he taken as a defining property of living organisms. Conditions

Answer 1