Yes, but the implications (especially in Wrath of Khan) is that it had other potential "applications," which is part of the reason Carol Marcus was so adamant that it NOT be used in a place where there was even a hint of life. And that's part of the reason why McCoy is horrified by the idea, since if you were to use it where life already existed it would (in Spock's words) "destroy such life in favor of its new matrix" as a weapon.
The description of how it works in the presentation spells out that it can reorder matter at the molecular level. So, in theory, it should be able to create animal life just as much as it does flora if you programmed it with the specifics.
Also, given that it re-animated Spock's body and does something to the microbes on Spock's torpedo tube that turns them into predatory worms, that seems to indicate it was capable of generating animal forms too.