Answer:
The fossils in the lower layers are older than the fossils in the upper layers.
Explanation:
the correct answer is the first one. density = mass / volume.
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B. It is rigid it is important becuase it keeps the plants structure and it allows the plant to stand upright.It is not a fluid and because it is rigid it does not stretch.It cannot be C. because the cell wall is made of cellulose and it is a non living maerial therefore it cannot be alive
