The phrase "assure survival" is correct and usable in written English.
It can be used in contexts where you want to convey the idea of guaranteeing or ensuring that someone or something will continue to live or exist.
Example: "The new policies were implemented to assure survival of the endangered species in their natural habitat."
Alternatives: "ensure survival" or "guarantee survival".
Diversity helps assure survival; if a crop of huckleberries fails one year, buffalo-berries may take up the slack.
Like the growth level, the companies in the startup level are dependent on relationships with larger local companies to assure survival and fuel growth.
When Yatom finds that cunning is no longer sufficient to assure survival, and that the various non-military alternatives have been exhausted, it is important to ask a crucial question: When will the West understand, as he does, that of all the options that were on the table, we are left with only the last one that has not been exercised yet to stop the Iranian nuclear program?
To assure survival of the PR/8 infected mice beyond 1 week post infection, mice were infected with 65 pfu (0.25 LD50) of PR/8 virus, a dose that caused minor weight loss in mice but did not cause mortality up to 20 days post infection.
The muscle tissue may adapt to loss of function in the SNP affected isoform to assure survival.
Likewise, unicellular organisms such as Paramecium or Loxodes must dynamically respond to fluctuations in ever-changing surroundings to assure survival [ 6].
Over a six-year period, a bacterium from the genus Rickettsia swept through the whitefly population, assuring survival advantages for the whiteflies and for itself.
It was, by most disaster measures, a successful rescue, though being pried from the rubble was only a beginning, by no means assuring survival.
First- and second-generation trials have shown that primary chemotherapy significantly improves the rate of breast conservation without increasing the risk of ipsilateral recurrence and while assuring survival rates comparable with those achieved with postoperative chemotherapy.
It paints a world where mediocrity and the denial of our dreams and history itself is seen as the means of assuring survival -- even when it is clear that by simply sustaining, simply fighting the losing battle of getting by, we condemn ourselves to extinction.
In the above scenarios, helping has both indirect fitness returns (i.e., assuring survival of non-descendant kin) and direct fitness (i.e., the possibility of inheriting a nest and rearing own offspring).
