A Unit 2.2 i 12 of 20 st cut into the side of a hill to study the layers of earth in the lower layers, she found fossils of plants with long deep root bases. In the upper layers
fossils of plants with wide, shallow roots bases which conclusion most likely explains the differences in the fossils?
The animals that ate the plants in the area changed over time periods
The amount of rainfall that the area received changed over time penods.
The number of plants in the population changed over time periods
The type of flowers that the plants produced changed over time periods.