Horizontal gene transfer (HGT; also known as lateral gene transfer) has had an important
role in eukaryotic genome evolution, but its importance is often overshadowed by the greater …

Horizontal gene transfer (HGT) is frequently observed in prokaryotes and until recently was
assumed to be of limited importance to eukaryotes. However, there is an increasing body of …

Even before the publication of Darwin's Origin of Species, the perception of evolutionary
change has been a tree-like pattern of diversification-with divergent branches spreading …

The source specificity and biosynthesis of cyclic isoprenoids such as hopanoids, sterols and
pentacyclic triterpenoids, which are commonly used as biomarkers in organic geochemistry …

Polyketide synthases (PKS) perform a stepwise biosynthesis of diverse carbon skeletons
from simple activated carboxylic acid units. The products of the complex pathways possess a …

Lateral gene transfer–the transfer of genetic material between species–has been
acknowledged as a major mechanism in prokaryotic genome evolution for some time …

Bitumens extracted from 2.7 to 2.5 billion-year-old (Ga) shales of the Fortescue and
Hamersley Groups in the Pilbara Craton, Western Australia, contain traces of molecular …

The primary diversification of eukaryotes involved protozoa, especially zooflagellates—
flagellate protozoa without plastids. Understanding the origins of the higher eukaryotic …

Horizontal gene transfer (HGT) is known to have contributed to the content of eukaryotic
genomes, but the direct effects of HGT on eukaryotic evolution are more obscure because …

Using molecular sequence data, biologists cangenerate hypotheses of protistan phylogeny
and divergence times. Fossils, however, provide our only direct constraints on the timingand …