In attempting to construct a universal phylogeny,researchers analyzed several different gene sets.The results of this analysis are not congruent (see accompanying figure).The most likely explanation for this,as proposed by Carl Woese and others,is ________ [three words] in early populations,which would account for these discrepancies.

Question

In attempting to construct a universal phylogeny,researchers analyzed several different gene sets.The results of this analysis are not congruent (see accompanying figure).The most likely explanation for this,as proposed by Carl Woese and others,is ________ [three words] in early populations,which would account for these discrepancies.
In attempting to construct a universal phylogeny,researchers analyzed several different gene sets.The results of this analysis are not congruent (see accompanying figure).The most likely explanation for this,as proposed by Carl Woese and others,is ________ [three words] in early populations,which would account for these discrepancies.