The diagram below represents a series of rock layers from a single location. Each different type of shape shown in the layers represents a fossil of a different species.

Suppose the blue star represents a certain fish species. When did this species go extinct at this location?
A.
at the end of the Jurassic
B.
at the end of the Cretaceous
C.
at the end of the Triassic
D.
during the Permian

How does natural selection change thephenotypes within a population over time?

Environmental impacts on evolution : mastery test

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return