Fossil Record/ Evidence for evolution

Uncover evolution's story in the fossil record!

The theory of evolution says that species can change over time.By analyzing the evidence in the fossil record, scientists can determine when an organism lived and what it looked like. Which of these is likely true about this environment? Ferns were the first to go extinct. Dragonflies could still be present in the area. Shells and fish were alive at the same time. Fish prey on dragonflies. What likely happened between layers 2 and 3? A period of intense rain made the environment more humid The environment became significantly colder. A long drought caused large bodies of water to disappear Seismic events like earthquakes disrupted the land What layer from site 2 corresponds with layer D from site 1? Z Y X w Based on the fossil record, what conclusions can be drawn about the changes in this area over millions of years? the climate became hotter the glaciers melted the sea dried up The fossils in layer A are The youngest The oldest The same age as layer W What is the closest common ancestor of the Allosaurus and Aves? Maniraptora Theropoda Dramaeosauridae Saurischia Using the branching diagram above, identify which of the following organisms are the most closely related: Worm and Fly; Spider and the Butterfly, Ant and Grasshopper. Worm and Fly Spider and Butterfly Ant and Grasshopper Look at organisms B and C. They share three common ancestors, X, A, and Z. How many common ancestors do organisms D and B share? 0 1 3 Over time the horse got _, its _ disappeared as the population evolved in response to the environmental changes. Smaller, toes Larger, Toes Smaller, ears Larger, ears