Life Changes Over Time Practice Test

A student examines fossils from two layers in the same location. Older layer: many fern fossils and insect fossils. Younger layer: grass pollen fossils and many mammal tooth fossils. Which evidence statement best supports the idea that life has changed over long periods of time?

A fossil site contains three layers (oldest at the bottom). Layer 1: only marine fossils (coral, seashells). Layer 2: marine fossils plus fish fossils. Layer 3 (youngest): mostly fish fossils and a few marine shells. Which statement is best supported by the fossil evidence about how life has changed over long periods of time at this location?