A. Fossils found in lower layers of sedimentary rock are
older than fossils found in upper layers of sedimentary rock.
B. Fossils found in lower layers of sedimentary rock are
as old as fossils found in upper layers of sedimentary rock.
C. Fossils found in upper layers of sedimentary rock are
older than fossils found in lower layers of sedimentary rock.
D. The relative age of fossils cannot be determined from their
position in sedimentary layers.
older than fossils found in upper layers of sedimentary rock.
B. Fossils found in lower layers of sedimentary rock are
as old as fossils found in upper layers of sedimentary rock.
C. Fossils found in upper layers of sedimentary rock are
older than fossils found in lower layers of sedimentary rock.
D. The relative age of fossils cannot be determined from their
position in sedimentary layers.
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A. is true. Unless you're a creationist, in which case they were all put there by god at the same time.
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A. is correct.