Yes, investigator b can use the specimens for cancer research without re-consent if the specimens are de-identified.
De-identification is the process of removing identifiers from human subject research specimens for the sake of privacy for research participants and to avoid leaking personal information.
<span>Since the specimen has been de-identified it can not longer be connected to a specific individual. Thus, his/her identity is safe.
I attached the document I read that is the basis of my answer. </span>
Mechanical weathering looks like the answer
I believe that both flatworms and roundworms have a body type called Bilateral symmetry. Animals that are bilaterally symmetric have mirror symmetry in the sagittal plane, which divides the body vertically into left and right halves, with one of each sense organ and limb pair on either side.
