-The diagram shows an outcrop of sedimentary rock whose strata are labeled A-D.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

-The diagram shows an outcrop of sedimentary rock whose strata are labeled A-D.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

Quizplus · Accepted Answer

Fossils of two closely related species, neither of which is extinct, suggest that these species have evolved relatively recently and have continued to exist through to the present. Therefore, their remains could be found in more than one stratum, specifically in the strata that were deposited during their existence. Since the question does not limit their existence to a specific geological period, it's reasonable to assume they could be found in at least two different strata that span their evolutionary timeline.

-The Diagram Shows an Outcrop of Sedimentary Rock Whose Strata