Q.
The diagram below shows an 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
A) The fossils in layer B were formed before the fossils in layer A
B) Modern forms of the 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
Explanation
These fossils demonstrates gradualism, the theory on the time frame of evolution that states that the species gradually changes over time. Since, the fossils are found in the different layers of sedimentary rocks, the older layer contains species that evolved into new species with some changes into the new layer of rock
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.