To discuss:
The domains to which prokaryotes belong.
Introduction:
Prokaryotes are unicellular organisms that lack a well-defined nucleus and other membrane-bound organelles. They comprise the groups Archaea and Eubacteria and are included under Kingdom Monera.
The three-domain system was proposed by Carl Woese and is based on the studies of comparison of rRNA in organisms. Ribosomal RNA or rRNA is a key component of ribosomes and is highly conserved as the rate of mutation is low. Using this system, all organism was classified as Archaea, Bacteria, and Eukarya of which Eukarya is made of 4 kingdoms: Protista,

Explanation of Solution
The prokaryotes refer to organisms that lack a well-defined nucleus and other membrane-bound organelles. Hence, there are 2 domains in which the prokaryotes are classified: Archaea and Eubacteria, as both lack membrane-bound organelles and a nuclear envelope.
There are additional features present in these 2 domains of prokaryotes that are summarized as follows:
Feature | Archaea | Eubacteria |
An amino acid that initiates translation. | Methionine | Formyl Methionine |
Introns. | Present in some genes | Absent |
Membrane lipids. | Branched | Unbranched |
RNA polymerases. | Several | One |
Cell wall peptidoglycan. | Absent | Present |
The domains to which prokaryotes belong are Archaea and Eubacteria.
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Chapter 28 Solutions
LSC TOMBALL BIOLOGY LL W/CONNECT
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