The endosymbiotic theory stated
that the mitochondria of eukaryotic cells are actually prokaryotic bacteria
which were once engulfed by prehistoric eukaryotic cells as a result of
evolution. 
 
Therefore to answer this
question, here are some characteristics: 
1 Both mitochondria and prokaryotic cells contain their own
DNA. 
2 Neither of the two have
true nuclei, but they do have a space in which their DNA is enclosed. 
3 Mitochondria and prokaryotic cells have similar
transcriptional machinery, which means that they have the same process of
making RNA from DNA.
<span>4 Mitochondria
contain their own genome, and the formation of their genome in most organisms
is circular similar to prokaryotes.</span>
 
        
             
        
        
        
Bacteria is important because this bacteria binds hydrogen molecules with the gaseous nitrogen to form ammonia in the soil.  During assimilation, or when plants take up nitrates from the soil, bacteria aid in the process with the plants in making ammonia. Animal wastes is also a major place where bacteria thrives and produces ammonia. The process in which assimilation occurs in plants, and then bacteria converts the nitrates to ammonia is called ammonification.  From the conversion of ammonia to nitrites, bacteria also aids in this process called nitrification. The nitrifying bacteria mostly present in soils, oxidize ammonia into nitrites, and from nitrites to nitrates.
Finally, the process of denitrification also has bacteria present to aid in converting nitrates back into a gaseous form of nitrogen in the atmosphere.
 
        
             
        
        
        
<u>Answer:</u>
<em>In highly diverged lineages, the substitutions process will occur at sites that have been substituted previously</em>.
<u>Explanation:</u>
Molecular clock uses the mutation rate to reduce the time in prehistory when the life forms are diverged. <em>The molecular clock uses the sequence of amino acids and nucleotide sequence for the DNA.</em>  
This clock does not measure any time but the number of mutations, and other changes over certain time.  <em>Sometimes its useful property might be limited due to the highly diverged lineages.</em>
 
        
             
        
        
        
Sure.  Single-cell organisms include bacteria and hens' eggs.
        
                    
             
        
        
        
Answer:
(Cystoplasm) and (Ribosomes) are common in most living cells
Explanation: