The phrase "are less viable" is correct and usable in written English.
It can be used to compare the feasibility or practicality of different options or ideas, indicating that one is not as viable as another.
Example: "In the current market, traditional advertising methods are less viable than digital marketing strategies."
Alternatives: "are not as feasible" or "are less practical".
It may be that male embryos are less viable in women who regularly limit food intake -- like skipping breakfast, which is known to depress glucose levels.
The core journalism being produced by these titles simply isn't suited to a mass audience – yet we're entering a world where niche publications are less viable than ever before.
Many conservation planners want to set minimum PA size thresholds, as small PAs are less viable and more expensive to manage, but this can only be achieved with existing software packages by repeatedly reducing the fragmentation levels of the PA system until every PA meets the threshold.
The rhetoric aside, HBCUs that cannot attract and retain experienced, visionary, passionate and effective leadership at the presidential and cabinet levels are less viable than those that can.
The process of somatic fusion using electroporation can be detrimental to protoplasts, particularly those that are less viable and unable to withstand the repeated centrifugation and culture manipulations required.
Dictyostelium cells that are mutant for TPP1 (disruptionruption mutant, tpp1−) are less viable than wild-type cells under conditions that induce autophagy, suggesting that TPP1 plays a role in the autophagic process.
"I buy and sell sheep to Thorneythwaite, so if that flock goes, mine is less viable".
Escaping hunger by illegally crossing into China appears to be less viable since Mr. Kim came to power.
Under these conditions it is advantageous for the parent not to channel valuable energy into the production of eggs, and the eggs themselves might be less viable because of the threat of desiccation.
Compared to uninfected controls, a mite-infested ladybird will typically lay smaller clutches and her eggs will be less viable.
Shannon Zimmerman, analyst at The Motley Fool, finds that refreshing since sometimes ETFs are created at companies after they've launched new coverage or a new product and might be less viable as a result.
