The phrase "altering itself" is correct and usable in written English.
It can be used to describe a subject that is changing or modifying its own state or condition.
Example: "The software is constantly altering itself to adapt to new user preferences."
Alternatives: "changing itself" or "modifying itself".
The speed with which this habitat -- aquatic and terrestrial -- has altered itself has surprised nearly everyone.
Dr. Block said past strains of anthrax were essential for understanding how quickly an organism altered itself in nature.
When it's forced to operate in a different state on a regular basis, it permanently alters itself.
"Gros Ventre," Ben reminds himself on a brief home leave, "was the same age as the tree rings in the mature cottonwood colonnade along its streets, and altered itself as slowly".
"The basic flaw in all those arguments," Dr. Drake said, "is that they don't allow for the opportunistic nature of life, its ability to accommodate or alter itself to cope with environmental change".
Twice the band performed remixed versions of songs rather than originals, but these didn't amount to explicit invitations for the audience to alter itself, and it didn't.
Trying to engineer a minimal cell cannot help but run up against this dichotomy, which Agapakis summed up as the "conflict between the emergence of evolutionary novelty and the construction of designed novelty" — in other words, between the logic by which we seek to alter biology and the logic by which it alters itself.
Storing a program in the computer's memory meant that the program could alter itself, opening up remarkable new computing vistas.
With the disease exerting evolutionary pressure on the region's population, their genome has altered itself to fight against the disease.
Toshiyuki explains, "The artwork constantly alters itself in response to the movement of fish".
