Which type of graft is represented by freeze-dried cadaver bone?

The type of graft represented by freeze-dried cadaver bone is indeed an allograft. An allograft refers to tissue that is transplanted from one individual to another of the same species but is not genetically identical, typically sourced from a deceased donor. In this case, the freeze-dried cadaver bone fits this definition perfectly, as it is bone tissue harvested from a human cadaver and then processed to prevent immunological rejection by the recipient, making it suitable for use in various medical procedures, particularly in orthopedic and dental applications.

Understanding the other terms helps clarify why allograft is the correct answer: a xenograft is tissue transplanted from a different species (like pig or cow tissue into humans), an autograft is tissue taken from the recipient's own body, and a composite graft involves multiple types of tissues, which doesn't apply here since freeze-dried cadaver bone is solely bone tissue. This distinction solidifies the classification of freeze-dried cadaver bone as an allograft.