The phrase "a constant evolutionary" is not correct as it is incomplete and lacks context.
It could be used in discussions about ongoing changes or developments in a particular field, but it needs additional context to be meaningful.
Example: "The species undergoes a constant evolutionary process that adapts it to its environment."
Alternatives: "an ongoing evolution" or "a continuous evolution".
A host plant and its pathogen (e.g. virus, bacteria or fungus) are typically in a constant evolutionary arms race.
That's because hosts and parasites are in a constant evolutionary arms race, which pushes both of them to get better at surviving.
Maintaining the appropriate sign and density of DNA supercoiling is vital for the cell and has represented a constant evolutionary challenge [4].
Similar approaches have been using either a constant evolutionary rate or a range of rates for these viral loci, and only single species data.
Second, since MTs are multifunctional proteins, their structures may have been subjected to a constant evolutionary "push and pull" by competing functional pressures which could have resulted in some convergent evolution of particular structural subunits.
It is well known that NJ have better properties than UPGMA when reconstructing evolutionary trees because it does not assume a constant evolutionary rate [ 20].
This observation reminds us a classic concept of molecular clock, which claims an approximately constant evolutionary rate over time for any given protein or DNA sequence in all lineages [ 35].
This distribution is the superposition of an unimodal distribution A and a pulse-like distribution B. For a single splitting event and constant evolutionary rate, d inter of orthologous alleles should be close to a normal distribution with the mean value corresponding to the divergence date.
Estimating divergence time can be done with or without assuming a constant rate evolutionary rate among all compared clades.
The majority of plant miRNAs are evolutionarily young and are only present in one to few species and it is likely that MIR loci in plant genomes are in a constant dynamic evolutionary state [ 15, 16].
This method applies a relaxed molecular clock that does not require the assumption of constant evolutionary rates among genes and lineages, and allows the use of prior constraints on divergence times.
