The phrase "a rare evolutionary" is correct and usable in written English.
It can be used when describing a unique or uncommon aspect of evolution, often in a scientific or biological context.
Example: "The discovery of this new species represents a rare evolutionary event that could change our understanding of biodiversity."
Alternatives: "an unusual evolutionary" or "a unique evolutionary".
Is host alternation evolutionarily labile or is it a rare evolutionary change in various phyla?
In sum, balanced terror would transform early humans into champions of friendship and virtuosos of empathy and solidarity, a rare evolutionary quirk.
The presence of an intron or intein is a rare evolutionary event and is unlikely to be due to chance, especially when multiple introns and inteins are discovered within the same gene.
With domain shuffling being a rare evolutionary event, it seems probable that apparent domain shuffling is a consequence of domain loss followed by domain gain rather than direct shuffling between proteins.
No comparable examples of 2-domain Navs could be identified by BLAST searching of the available metazoan genomes in the NCBI database, suggesting that this is a rare evolutionary divergence which may be confined to aphids.
The transition between dsRNA and +ssRNA (or conversely) does not give the impression of being a rare evolutionary event (dsRNA viruses have been shown to cluster with viruses of the alpha-like superfamily [ 50] and of the picorna-like superfamily [ 51]).
Notice also that phylogenetic methods do not take into account the fact that RdRps of the birna-, permutotetra- and Drosophila A viruses share a common rare evolutionary event, namely the permutation of the functional ABC sequence motifs that involve a local rearrangement of the polypeptide chain.
The obvious question was: How atypical amino acid replacenments, which, are, as a rule, rare evolutionary events, may affect the structure of cyclin molecules?
These heavy tails allow rare evolutionary increments of large magnitude to occur, resulting in a volatile evolutionary process characterized by occasional "adaptive" evolutionary shifts interspersed with neutral-like patterns of variation.
Thus, it appears that the changes of expression pattern found in small-scale studies do not represent very rare evolutionary events, but rather that divergence by expression is a relatively common phenomenon between human and mouse orthologs.
Just like humans, killer whales experience menopause – and the rare evolutionary trait improves their offspring's chances of survival, according to experts.
