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Living World App's Quiz & e-Book Download - 1746

MCQ:

The older sediment layers have less radioactive isotopes than

  1. upper layer
  2. younger layer
  3. older layer
  4. deeper layer

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Living World App (Android & iOS)

Living World App (Android & iOS)

College Biology App (Android & iOS)

College Biology App (iOS & Android)

9th Grade Biology App (Android & iOS)

9th Grade Biology App (Android & iOS)

O Level Biology App (Android & iOS)

O Level Biology App (iOS & Android)