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Fossil X can be considered to have evolved earlier than fossil Y if Y has vestigial structures that are homologous to functional structures in fossil X Y is structurally more complex than fossil X Y is in better sate of preservation than X X is found in lower stratum of undisturbed sedimentary rock than Y

Fossil X can be considered to have evolved earlier than fossil Y if
  1. Y has vestigial structures that are homologous to functional structures in fossil X
  2. Y is structurally more complex than fossil X 
  3. Y is in better sate of preservation than X
  4. X is found in lower stratum of undisturbed sedimentary rock than Y

Grade:12

1 Answers

Arun
25750 Points
6 years ago
Dear student......Fossil `X` can be considered to have evolved earlier than fossil `Y` if fossil `X` is found in lower stratum of undisturbed sedimentary rock than `Y`. Fossils are preserved forms of living organisms that really existed on earth. Presence of `X` in lower stratum indicates that it existed of `X` in lower stratum indicates that it existed much before than `Y`. ......hence option D is correct.

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