Exam 3 Study Questions 11-21

Exam 3 Study Questions 11-21 - B iology 100 Exam 3 Study...

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Biology 100 Exam 3 Study Questions 11-21 11. What is the evidence that species have changed through time? What was the “law of succession?” How is the law of succession related to transitional forms in the fossil record? The evidence that species have changed over time are the fossil records, which continued to expand. Also data regarding extinction, transitional forms and environmental changes supported this hypothesis. The law of succession a striking resemblance between fossils found in the rocks underlying certain regions and the living species found in the same geographic areas. This generally means that extinct species in the fossil records were succeeded in the same region by similar species. This law is related to transitional forms in the fossil records through the fact that it shows the relation between species today and their ancestors. Transitional form is a fossil species with traits that are intermediate between those of older and younger species. 12. How did Darwin interpret the fact that species had gone extinct? In what way do vestigial traits support the view that species have changed through time? Darwin interpreted the fact that species had gone extinct by using it as evidence to say that species are not static, immutable entities, unchanged since the moment of special creation. His reasoning was that if species have gone extinct then they have changed through time. Vestigial traits support the view that species have changed through time through the fact that new forms of these traits have been created from the vestigial traits. 13. Striking similarities exist between certain organisms but not others. What are the different types of homologies found to exist between organisms? Why do such similarities suggest that certain species are related to each other? Which of types of homologies were known to Darwin because they had been recognized and studied well before Darwin? Provide an example of a developmental homology.
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This note was uploaded on 10/19/2010 for the course BIOL 100 taught by Professor Staff during the Fall '07 term at UMBC.

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Exam 3 Study Questions 11-21 - B iology 100 Exam 3 Study...

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