Read the following and answer the Questions.
Passage 1,
Changes in Organisms over Time
Using fossil evidence, scientists can learn how organisms have changed over long periods of time. The chart shows information about how traits of ancestors of the modern horse have changed.
(a)
Characteristics of Four Horse Species
A scientist finds a site that contains fossils of Orohippus, Meshippus, and Miohippus.
Identify the species of horse fossils that would be found in the uppermost layer of rock and in the bottommost layer of rock. Use data from the chart to explain your answer
Part A
Species of fossil found in uppermost layer of rock:
The species of horse fossil found in the uppermost layer of rock would be Miohippus. This is because Miohippus is the most recent ancestor of the modern horse according to the chart, so its fossils would be found in the most recent layers of rock.
Species of fossil found in bottommost layer of rock: Orohippus. This is because Orohippus is the oldest ancestor of the modern horse according to the chart, so its fossils would be found in the oldest layers of rock.