[Answer] Which process occurred frequently in the early history of the three domains on Earth and makes determining phylogenetic relationships of that time difficult?

Answer: horizontal gene transfer
Which process occurred frequently in the early history of the three domains on Earth and makes determining phylogenetic relationships of that time difficult?

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The three domains are not rooted nor is the Eukaryote Crown Group rooted to the Archaea and Bacteria Domains . Mention of an unrooted tree the Ring of Life or the fact that there is not nor ever will be a LUCA should be mentioned somewhere in the …

Evidence of common descent of living organisms has been discovered by scientists researching in a variety of disciplines over many decades demonstrating that all life on Earth comes from a single ancestor.This forms an important part of the evidence on which evolutionary theory rests demonstrates that evolution does occur and illustrates the processes that created Earth s …

The evolution of plants has resulted in a wide range of complexity from the earliest algal mats through multicellular marine and freshwater green algae terrestrial bryophytes lycopods and ferns to the complex gymnosperms and angiosperms of today. While many of the earliest groups continue to thrive as exemplified by red and green algae in marine environments more …

The phylogenetic tree on the right represents these relationships for the three major domains of life. The modern understanding of evolution is based on the theory of natural selection which was first set out in a joint 1858 paper by Charles Darwin and Alfred Russel Wallace and …

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