How does the geographic distribution of species today relate to their evolutionary history? * How do fossils help to document the descent of modern species from ancient ancestors? *

What do homologous structure and similarities in embryonic development suggest about the process of evolutionary change? *

Do you think the shell of a clam and the shell of a lobster are homologous or analogous structures? Explain. *

How can molecular biology be used to trace the process of evolution? *

What does recent research on the Galapagos finches show about natural selection? *

1.  Patterns in the distribution of living and fossil species tell us how modern organisms evolved from their ancestors.

2.They help in that, many recently discovered fossils form series that trace the evolution of modern species from extinct ancestors.

3.Evolutionary theory explains the existence of homologous structures adapted to different purposes as the result of descent with modification from a common ancestor.

4.The shell of a clam and the shell of a lobster are probably analogous, because they have a common function

5.The use of molecular clocks to track evolution includes both ribosomal RNA sequences for deep relationships and mitochondrial DNA for recent divergences.

6.The Grants have documented that natural selection takes place in wild Galapagos finch populations frequently, and sometimes rapidly, and that variation within a species increases the likelihood of the species adapting to and surviving environmental change.

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