Chapter 1.1, Problem 2CC

Summary Introduction

The tiny organisms which could be viewed only under the aided eye are referred to as microorganisms. In general, microorganisms lack highly differentiated tissues. They can occur in both multicellular and unicellular forms. The cellular organisms are divided into three domains, namely Archaea, Bacteria, and Eukarya. Numerous acellular infectious agents are also included in the microbial world.