If x indicates the fossils of two closely related species, neither of which is extinct, then their remains may be found in how many of these strata?
A) one stratum
B) two strata
C) three strata
D) four strata

Question

Quizplus · Accepted Answer

The fossils of two closely related species can be found in two different strata because they must have existed at different times but still be closely related. Therefore, their remains must be found in two different layers of rock.

If X Indicates the Fossils of Two Closely Related Species