EvolutionEasyBloom L3
Question
The diagram below shows undisturbed sedimentary strata at the bottom of an ocean. The fossils found in layer B resemble the fossils found in layer A. This similarity suggests that
Options
A.the fossils in layer B were formed before the fossils in layer A
B.modern forms of life may have evolved from earlier forms of life
C.vertebrate fossils are only found in sediments
D.the fossils in layer A must be more complex than those in layer B
Solution
Sol.(b) [Key Concept: Sedimentary Strata — Deeper Layers Hold Older Fossils] In undisturbed sedimentary strata, lower layers (A) are older and upper layers (B) are younger. The similarity between fossils in layer B (younger) and layer A (older) suggests that modern forms of life may have evolved from earlier forms of life — the younger fossils resemble but show gradual change from the older ones, demonstrating evolutionary continuity.
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