Protists are least similar to bacteria because all the others are eukaryotic cells. Bacteria are prokaryotic.
Answer:
Identifying the fossil is the first step. We have already identified this fossil as a clamshell. We know clam are from the sea, but if you didn't, you could conclude this from knowing where you found the fossil (likely near the beach). Discovering where it is can also lead you to a conclusion on it's arrival as a fossil, perhaps washed up on shore or buried by an animal.
Explanation:
Cell wall: strong; supporting layer around the cell membrane in plant cells
50. because its 140 in 1991 and about 90 in 1992.
It has a strong influence on the ecosystem
