The phrase "a single origin for" is correct and usable in written English.
It can be used when discussing the source or starting point of something, often in contexts like history, biology, or cultural studies.
Example: "The researchers found evidence suggesting a single origin for the species, which challenges previous theories of multiple independent evolutions."
Alternatives: "a sole source for" or "a unique origin for".
This tree thus favors a single origin for paired, segmental, ventrolateral appendages as shared by the three panarthropod/aiolopodan phyla.
Here, we discuss the geographic and genetic reasons why a single origin for domesticated rice is compatible with current data regarding the evolution of rice.
In contrast, the object space-based method uses a local tangential plane with a single origin for the entire space; its x-parallax disparity is not always proportional to the ground height.
This view is at odds with most of the genetic evidence currently available on Native American origins, the majority of which [5] [7] - though not all [8] - suggest a single origin for New World populations.
The haplogroup distribution, together with the similar coalescence time for these haplotypes, has been used to support a single origin for extant American populations, as well as a swift pioneering process of the initial north to south migration [12].
In humans several EEG studies have pointed to more than a single origin for the alpha rhythm: one which is spontaneous, resulting from distributed sources and unassociated with any external stimulus; and another that is more localized and induced by a stimulus [15], [16], [19].
Of the top ten archaeal chromosomes with high gGCSI values, only seven were significant (p < 0.01), including two human intestinal archaea Methanobrevibacter smithii gGCSI = 0.315, z = 13.5) and Methanosphaera stadtmanae (gGCSI = 0.117, z = 7.06) that are reported to have visible GC skew, suggesting a single origin of replication for each [ 33].
In Culex pipiens, there is evidence for a single origin of a duplication in esterase genes, conferring metabolic resistance to organophosphates, followed by global spread through migration [2].
Authors' response: We actually mention phylogenetic evidence for a single origin of the cpRAS domain in the text.
Against the background of recent support for a single origin of nonflagellated terrestrial fungi (Zygomycota plus Dikarya), James et al. [ 5, 15] found yet another possible example of convergent loss of flagella.
Perhaps the most convincing argument for a single origin of the duplicated region in the Sulidae is that the partial cytochrome b copy differs in length by only three base pairs in the three species, and we find it unlikely that this pattern could emerge by parallel duplication and degeneracy.
