The Work of Peter Williamson on Freshwater Snails in Lake

question 22

Multiple Choice

The work of Peter Williamson on freshwater snails in Lake Turkana showed

• A)perfectly interconnected and gradual change in species due to the uniform environment over time.
• B)an abrupt radiation of species in all directions that can be used to support both gradualism and punctuated equilibrium.
• C)thick deposits of unchanged snails and brief periods of rapid change,supporting gradual adaptive radiation.
• D)thick deposits of unchanged snails and brief periods of rapid change,supporting the evolutionary model of punctuated equilibrium.

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