The fossil is likely to be a mold fossil as the organism's environment likely consisted of soft, moist terrain.
The answer would be cytotoxic cells.
I believe that of all twins who share identical genes with a schizophrenia victim, about one-half do not themselves develop schizophrenia. Schizophrenia is a mental disorder that usually appears in late adolescence or early adulthood. Characterized by delusions, hallucinations, and other cognitive difficulties, schizophrenia can often be a lifelong struggle.
Answer: Permeable
Explanation: In the picture you can see that only the red ones can pass through.
Maybe detritivore and parasite. That's the best I can think of