Which example is not the proper use of a casting of a toolmark?
comparing with a photograph of a suspect tool
examining for other trace evidence adhering to the cast
comparing directly to a suspect tool
comparing with the cast of a suspect tool

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

How does the molecular clock work? a. it analyzes the brain functionality of two different species. b. it examines and compares the physical characteristics of two different species. c. it illustrates relationships between two different species. d. it compares the number of mutations that exist in the dna of two different species.

When analyzing tree rings, what do scientists assume a thin ring indicates?