GENERAL HISTOLOGY

Detailed explanation-1: -Typical prokaryotic cells range from 0.1 to 5.0 m (diameter). They are significantly smaller than eukaryotic cells, which usually have diameters ranging from 10-100 m. The high surface area relative to low cell volume allows more rapid growth rates.

Detailed explanation-2: -They are organisms which do not have proper cellular organization i.e they lack cellular organelles and a nucleus and therefore small in size.

Detailed explanation-3: -An individual virus is called a virion. It is a tiny particle much smaller than a prokaryotic cell. Because viruses do not consist of cells, they also lack cell membranes, cytoplasm, ribosomes, and other cell organelles.

Detailed explanation-4: -The primarily single-celled organisms found in the Bacteria and Archaea domains are known as prokaryotes. These organisms are made of prokaryotic cells-the smallest, simplest and most ancient cells.

Detailed explanation-5: -Prokaryotes come in various shapes, but many fall into three categories: cocci (spherical), bacilli (rod-shaped), and spirilli (spiral-shaped) (Figure 1).