Answer
Four structures that some, but not all bacteria posses are:
1. Endospores: It is a dormant and tough structure which can survive harsh environments.
2. Flagella: It is a long, tail like structure which help some bacteria move
3. Pilus: A hair like structure, which is used for transfer of genetic material to other bacteria
4. Fimbria: These are also hair like structures. Found near the ovary, they are used to catch eggs and move them down the Fallopian tube.
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