Chapter 2, Problem 2Q

Summary Introduction

To explain:

The reason for the fact that the archaea and bacteria considered to be very closely related before the availability of molecular techniques on the basis of microscopy.

Concept introduction:

In earlier times, it was assumed that there were only two domains (Bacteria) and (Eukarya) based on differences of nuclei, cellular organelles, and the cytoskeleton. The “bacteria” living in very harsh conditions were identified and named archaea.